I dont see how escrow can work in this case. The OP wants to receive fiat now (he provides 33% discount based on present rate) and he will send bitcoins every day for 90 days in installments.

He has some miners setup which earns the bitcoins and those bitcoins will be the ones that will be distributed.
He is planning this way to get fiat through bitcoin sales instead of selling miners itself.
This is the info i have got from him over PM.