You are newbie so we have to be cautious and you would have to share much more details.

Proof of ownership? Pic of your rigs ...?
Are you going to charge electricity and maint. fee or just higher bid takes?
Any min/max renting period? Any private access to miners?   
Guaranteed uptime? What happens if not reached?
Escrow?

BTW. I think you should move this to Service Announcements section.