Congratulations on your newborn. I was just reading through a thread on BTC POP ceiling yesterday, and I came across a comment where the member made mention of it getting to a time where people will name their children after Bitcoin. I was thinking this will be one of those threads.

Out of the options that you mention, check which one will be easier for you to do and carry on with it. What's most important is that you are able to accumulate something for your child before he grows up to a stage where you will hand it over to him.

Wow... A big congratulations to you and your family.

Mining is very expensive and solo mining wouldn't give you any profit because it will be hard for only you to be able to mine a block due of the increase in difficulty target. If you are interested in mining, you should join a mining pool.

It will be good if you open a wallet for your child and deposit bitcoin in his wallet for him/her whenever you can or when he's been given funds as a gift, you can use it to buy him bitcoin. When your child is ten years, you will be surprised on how much bitcoin has been deposited into his wallet.

You can try mining, but honestly? It's not really profitable for individual miners anymore. Even with free electricity, if you can't compete with the industrial-grade rigs big companies use, your earnings will still be small. My simple suggestion: The easiest path is to just earn or buy Bitcoin and hold it. Holding doesn't need special skills or deep knowledge - just trust in Bitcoin's future.

Honestly I will diversify.  Since we are talking about established financial status through Bitcoin alone here, it would be best to add more investment besides Bitcoin.  

We cannot say what the future holds, Bitcoin might soar in an imaginable height or Bitcoin might become stagnant or worse get dumped.  It is always best to have a backup plan, or something that can support us when one of our sources of income fails to deliver.  Aside from that not all years is a golden year for Bitcoin, so during those times of hodling, we must make sure that we have the other means to support our daily needs.

It is not bad to be a Bitcoin fanatic, but it is is always better if we have alternative ways in bringing profit in our table.  This way, we can make sure that the future of our family especially our kids is well supported by our income.

Accept my extended congratulations too Op.
On that note, every good thinking parents could as well plans for their kids as same time planning for long time goal.
Op having the plans to begin accumulating bitcoin for his new born child is admirable which likely, could set the child up to also become a bitcoineer and enjoys the digital assets when he grows up after claiming his inheritance by his lovely dad.
But I will encourage that Op should have a hardware wallet to store the bitcoins as the case maybe that it is an offline storage device suitable to hold bitcoin in a long time to keep off from insecurity online threats to assure the childs assets safety.

The age of mining is dead for solo miners for almost a decade now. If you're looking for ways to amass bitcoin for your child, it's best to just buy it on a regular schedule. This applies the principle of DCA (dollar cost averaging), so even if you buy it high on 1 month but bought it very low on 2 months, it will find a nice average for your entry price.

Or instead of wanting to teach your child to trade at an early age, why not do it yourself, earn some money, and send your child to a good school then teach him/her the principles of trading when he's/she's knowledgeable enough. Most parents fail in teaching their kids because they are eager to have them learn something they're not intended to learn at a very early age, without considering what the child wants to learn at that point. Making them interested in bitcoin by seeing you do it first-hand is way better than forcing them to learn it just because it gave you the means to survive in this world.

And since you were able to get something out of bitcoin, why not let it grow further by looking for other investments that will boost your wealth even more? Bitcoin as an asset alone is already a rock-solid investment, but it's not always reliable as it's not appreciating 100% of the time (it's cyclical, at least that's what our data suggests).

Teaching them something about crypto is great, but let the kid enjoy his/her life as a kid first, and just inspire him/her by doing what you do best in front of him/her.

As much as I love Bitcoin as a whole, I'd try to dip my toes into other markets as well ^{[e.g. Gold can be a safe route, especially if you belong to a country whose current system is failing]}.

My knowledge, but I'd only take baby steps for the first decade of his life ^{[there are already plenty of bitcoin-related kids' books for different age brackets]}.

As a former miner, you don't want to deal with the increased noise levels anywhere near your house ^{[there are solutions for isolating it to a certain extent, but this is only one of the many issues (e.g. maintenance, faulty boards and etc) that you're going to face]}.

The DCA route is excellent, but only if you're storing it in a secure storage device ^{[e.g. HW, but it still depends on their models]}!

OP, you have already answered all your questions yourself. You have everything to build your child some capital. No one will give you better advice until you understand how important it is for you. But in addition to your words, I would try to build some business that would be your insurance for the future, let it be bonuses from the profit of Bitcoin growth over time. I always believe that any money should not lie without movement and work; it is always good to have several sources of income, passive income for your old age, and saving money for your future children and the born son.

congratulations on starting the journey of fatherhood!

the advantage of being exposed to technology is that you give the next generation coming behind you an edge such that they don't have to start from scratch. my father knows little or nothing about technology, and because he was just a schoolteacher, growing up, the interest I had was how to become a better teacher than my dad. now, over time, I have grown to know that the direction we are headed to is a technology-driven time, and so, as I continue to delve deep into the technological ecosystem, whatever I have learned will become a stepping stone that my children will start from.

as a Bitcoin enthusiast, it is going to be natural that from a tender age, my wards will learn about Bitcoin, and if they are so interested in it, I will assist them in the best of ability to ensure that they get started in a good way. I might not, as it stands, have so much holding to keep some reserve for them, but through what I stand to gain from my investment, it will stand to give them the best of life that will make them stand strong in making their decision whether to join me in this niche or not.

However, congratulations to you on the successful birth of your new born baby. Because it is indeed a pleasure to have upcoming Bitcoiner who will take over from us when we grow old. Because initially if I was to be in your shoe, I would have bought a "Solo Mining Device" to start mining Bitcoin, since you already started you have a stand-by electricity which is powered through the use of Solar system, while you buy a certain amount of Bitcoin (i.e 0.001 or 0.01) and hold on to for a period of 15yrs, when the child could have grown up to adolescent age, as a fund to carter for his/her university studies. Because the possibility of Bitcoin to skyrocket 10x in next 15yrs is very possible.