RV Fairylady gave good advice. As long as you are prepared for fairly continuous routine repairs, go for it. You aren't going to get into motorhme RVing any cheaper elsewhere.
Do, though, be aware of the risks of purchasing a heavy vehicle with 92k miles on it. The chassis was built to be a van with the occasional heavy loads, but a van loaded with an RV body has been heavily loaded and worked hard for every one of its 92,000 miles. Any van with 92k miles is well into its senior years mechanically - transmission, steering components, alternator, starter, etc. are going to fail in the foreseeable future. Maybe tomorrow or maybe at 129k miles, but you will experience these sorts of failures. If you can't deal with them, either mentally or financially, an older RV like this is not for you. In fact, it would be best if you are the Do-it-yourself type, since paying a shop for such repairs can be very, very, expensive. Especially if stranded at the roadside somewhere.