Hello!
Yes the minimum investment is 100,000 HN around 170$ .
100,000 HN should stay on your Turle Wallet so you can receive the monthly payouts.
Once a month people will get distributed there revenue according to the share of HN they hold.
You can read more informations about the project here :
https://tokensale.hellenicnode.euI ll be glad to assist you more if you have any more questions.
Odysseas