Just some ideas that need clarifying before you take peoples' money. 
Do you have backup power supply, internet etc? Physical security?
Is a share for a time limited or until the machine dies or is voted to sell?
I'd suggest much lower shares, to give people without much coin a way to join in. Perhaps one share 0.01BTC for 1/200th part of each machine. You would probably get some people putting in 0.1BTC or more.
Or price shares in $ so it's clear what is being spent (all in fiat), and patrons can look-up an exchange rate they like.
As you appear to be a relative newcomer, can I suggest you use an escrow account until you have enough to purchase a machine, and have your identity registered
Do you have backup power supply, internet etc? Physical security?
Is a share for a time limited or until the machine dies or is voted to sell?
I'd suggest much lower shares, to give people without much coin a way to join in. Perhaps one share 0.01BTC for 1/200th part of each machine. You would probably get some people putting in 0.1BTC or more.
Or price shares in $ so it's clear what is being spent (all in fiat), and patrons can look-up an exchange rate they like.
As you appear to be a relative newcomer, can I suggest you use an escrow account until you have enough to purchase a machine, and have your identity registered
wow chill!
I do have power backup AND redundancy. This is a server room I'm using. Its located next door to me it has a doorlock and alarm system and its own ac.
I'm gathering peoples opinions so I can build a good rig, when I start the group buy I'll surely add all the details about the rig setup, server room and whatever else you need.
Will sell shares when I start the group buy, probably in € or BTC and Will have escrow.