You can do what i did , i didn't make them pay in any of the setting up costs , i built everything and i have free electricity , after building everything i charged them 1/3 of thier profits to host the rigs in my place and taking care of everything and the offer was fair enough for them.
i would never host anything if you are asking 33% of my revenue, this is stupid crazy man, would kill my profit 100% and roi would take much longer, and asking 33% isn't very different than mining with very expensive electricity, so why i should mine in your facility? i just keep mining with my expensive electricity