So I've explored about 8 or 9 different game server hosts. Survival Servers only takes about 20 minutes to set up. That includes configuring extra levels and engrams, changing the map, adding mods (if you don't have any that conflict or are too extensive) and have a fundamental understanding of FTP.
I just set up a second server. I have plans to start several more.
I would be interested in knowing if anyone has insight into running multiple servers and/or maintaining them.