MiningRigRentals should do it. I don't see a minimum deposit for Bitcoin on the site (I'm currently logged in to the site), and they only require 3 confirmations for your funds to be added. There's a fee suggestion but you don't have to use it, of course. I used MRR back in January of 2016, and I still use it occasionally today, and from what I can see now they're legit. They also allow you to deposit in LTC, Dash and ETH if you happen to have those coins for easier deposits.