To clarify, you d... Più o need to have some knowledge on how to set up a server, but who is renting a server without that kind of knowledge anyways?
I never had any billing problems either. Of course you have to check the contract, but for VPS e.g. there is no minimum rental time, you can cancel the server after 10hrs of usage without any problem for example and only pay for those 10 hours. Meno