Hey, yeah, I think I'd manage installing a mediawiki without too much problem (have dabbled in PHP and SQL before), and I got a server that I pay for every year but don't use much anyways. The question would be just the choice of a domain name and a way to get the old content back in its entirety, because I don't feel like I'd be up for rewriting everything, even if it is not from scratch, but from some older version.
But yeah I think I'll give the local admins a month or so to figure it out. If nothing happens in that timeframe I will start a fresh one.