I'am thinking about renting 100th and throwing in here, decisions decisions !
Try with one or two Ths first until you get used to rental service web interface
For instance if you delay your payment for a couple of seconds in miningrentals you hire next/previous rig in list
That is my experience with them...
Also i can state that most of the rigs there are over advertised with at least 15-20% you will not be able to reach the speed rented for sure
They will say that is due to variation, bad diff , pool issues and whatever you can think of but the truth is that this is their fault not pool fault
My guess is that they run ANTS with crappy Chinese cgminer fork ...