@Lilli
Bit delayed, but hypothetically Rhost should compile cleanly on any unixy system.
There was a bug with latest ubuntu with our openssl identifier that would think openssl was installed when it really was not. Mind you, it doesn't require ssl at all, it just enables it if it detects it. It enabled it erroneously on newer ubuntu systems (14.04+ apparently).
It's been successfully compiled on all flavors of Linux, FreeBSD, OpenBSD, Mac OSX Lion up to Yosemite (not tried the latest, anyone willing to give it a go?), Solaris, AIX, it used to work on HPUX, not tried since, like, the dawn of dinosaurs, and even got it working with CYGWIN on Windows (I still need to shower for that). Think someone got it working on a PS2 and rasberry pi for kicks, but I never saw it running so take with a grain of salt.
I know people on MUS*H (The PennMUSH dev site for those not in the know: gungnir.pennmush.org 4201) or on the Dev Asylum (The RhostMUSH dev site for those not in the know: iweb.localecho.net 4201) offer free hosting, some on local systems, some on raid-capable deduped systems.
They tend to host anything you want, Penn, Mux, LP, Circle, Smaug, Rhost, Diku, etc etc long as it likely won't be a security risk and eat the server while grunting like an alien hybrid. I'd just openly ask around, and you may be surprised on what servers are available for hosting.
As for requirements for Rhost, I've done my best to make sure they're as minimalistic as possible:
You need a ksh/bash/dash for a shell and standard unix tools (grep, awk, etc)
You need a compiler (gcc or clang)
You need libcrypt (which should be standard)
openssl dev packages (optional, skips digest/ssl if not found)
libpcre (optional, it uses it's on internal code if not found)
mysql (optional, ignores it if not enabled)
sqlite (optional, ignores it if not enabled)
And as it can integrate with external processes, binaries, and scripts, likely whatever else you may want to integrate with Rhost.
So, minimal needs, to whatever you want to throw at it I guess.
Good luck 
--Ash