If you intend to save money I think you're on the wrong track. You'll need registration, insurance, tags, inspection, gasoline, propane, etc. If you stay in campgrounds you have to pay for that too. If you stay in "free" areas then you have to find a place to get water and dispose of sewer. No mater how you slice it living in an RV takes money.
That price seems pretty high considering the following RV's I found on RV trader.
https://www.rvtrader.com/listing/2005-Dolphin-WORKHORSE-5015554485
https://www.rvtrader.com/listing/1993-National-DOLPHIN-32D-5015180322
https://www.rvtrader.com/listing/1990-Mallard-Sprint-30--5015358878
