Do you have the facilities to host this many avalons? Can you tell us a bit more where you'll be hosting them? (Home, office, data center, etc)?
I am planning on hosting them in my home, but those plans could change in the future. I have ran LTC rigs here for months and had no problems at all, I don't see how Avalon's will be any different... no need to pay for an office/data center/etc.