In your example, we would give you enough ASICs to double the amount of additional hashing capacity that you would have needed - not just enough to break even.
So say instead of 2, you would give 4. So I'll have to pay 4x boards/4x assembly/4x delivery. Have to use even MORE money before than to get back my money. You say more than break even so I'm assuming it's enough to just cover the electricity/boards/assembly/delivery and not just the initial purchase only. I mean it would be dumb to say you're going to give guaranteed profits but you're not saying that since this is not an insurance policy
By the way, what do you mean by licensed rig makers? Would you be licensing your boards to them so they can build it or is it just verified/certified rig builders?
If it's the former, damn you're going to be making even more money.