User blog comment:Rupert Giles/Global Navigation Update/@comment-6969786-20141208074533/@comment-1038387-20141208163417

There are several free wikifarms. Most use MediaWiki like Wikia, though what features they have may differ.

Going to your own domain would involve operating your own software, which (i'm told) is not as time consuming as some would make you believe it is, at least not beyond the initial stages. It does require knowledge of coding though.