What is your real budget? For travel, you are most likely going to be buying tires, those will be another $2000. At that age, hoses and belts for the engine, transmission fluid change and transmission service, brake service (at least inspection). Maybe $3000 - $5000 to be on the road, without doing anything about the house part of it.
Somebody bought this thing to live in it while it was sitting, and it is probably good for that purpose with some fixing up. Or maybe short trips out to a local campground where it will mostly sit, hooked up. I know people in a local camping club who use vintage motorhomes that way.
You say "aftermarket" refrigerator, I'm thinking a small compressor fridge? That needs 120V power, easy to do when sitting with hookups, more of a problem when on the road. It can be done with an inverter if the alternator is up to the load, or the motorhome likely has a generator. Does the generator work? It can be a few hundred to a couple thousand dollars to pull out a gasoline RV generator, bench it for restoration to working condition, and reinstall it; I'm going through that one now on a genset a whole lot newer, for which parts are readily available.
What you'll get for $2000 is the starting point for a vintage motorhome restoration project that could go through another $10K to $20K before you are through, and likely not be worth that when finished because there is not much of a collector's market, except for a few special things like Airstreams.
Saving money on hotels when traveling, for two people? My experience, motorhoming travel doesn't work that way. If I travel 300-400 miles a day in my 8 MPG motorhome, I spend an extra $130-200 a day on gas over what I need to fuel my 36 MPG car; that covers some pretty nice lodging for two people. Now if you are carrying 6-8 people, the motorhome comes closer to breaking even. If you are just moving around occasionally, 100-200 miles every week or two with longer stays, that motorhome (or any RV) saves you money, but in popular destination areas (think Disneyworld or the California beach resorts) RV site fees may still be as high as 1/3 to 1/2 the price of a three to four star room.
