Please don't interpret this as an attempt to argue with you about your decision to run Rhost or anything not Ares, but Ares is perfectly capable of running on a self hosted machine (or VM, even), though it's not as easy to set up. Is it a matter of Ares's additional requirements not being available on the host you have access to?
I'm somewhat new to the MUSH scene, but not particularly new to MU*s. I feel pretty strongly that Ares is the way of the future in terms of accessibility and growing the community's player base, with a lot of younger folks not quite being willing to learn what 'telnet' is..