I don't see how you'll get much money back out of it.
You don't seem to be thinking of a lot of bisiness.
Registration and insurance will be several hundred bucks a year and it's a gas hog!
30 miles, each way=6 gallons of fuel, if it's running well, which is nearly $20 now and will be a lot more when gas goes back up.
Yes, it's a nice old beater, maybe, but will cost you.
The guy has a rotting junker now, so why is it worth more than $200?
Try to handle the tire yourself, AFTER everything else is taken care of. Why waste money on it sooner. If you handle it yourself you can get e good usable tire, installed, for $20-30, at least around here, which is a high cost area. The other tires are probably rotting too, so don't expect a lot of heavy hauling before they start going too
Expect to work on the brakes. At that age, lines will be rotting/rusting away.
Check the book on the clutch. If it's hydraulic, it's big bucks. If not, it's just expensive.
Engines pull hard in RVs. They sell special exhaust manifolds because the RVs run them so hot.
Are you trying to baby your '97? Why not get a liner and use the thing? For what you spend on the old truck, you can get close to buying a heavy trailer, which you can park when it's not needed.
I love bringing old things back, but I usually wind up paying.
My "new" pickup is an '89 F-150. It's FAR better than the '82 beater it replaced. It was a great buy at $500, but took $500 more to clean out the tank, and , after a year or so, $800 for a clutch. I knew and expected both expenses and it's still a good buy at $1800. It's clean, no rust, and no dents. I expect it to last for at least ten yrs, by which time I'll probably too old to use it!
I sold a worn out beater '82 F-150 to a friend because he pestered me for it. He asked how much I wanted and on a whim I said $500! They have a few horses and they love the old truck, go figure. I liked it too, but it had worn the engine until my 16' tandem was really bogging it down. The '89 pulls the tandem as fast as I want to go and takes gearing down only on moderate hills. It's a 5 sp too, which makes for a great cruise, 70 mi/hr easily.
I'd take the fuel line off at the carb and crank some clean gas through from the tank (after draining) before letting any into the carb. Be sure there is a NEW filter in the line too. The leak is probably the bowl gasket and maybe overflow from a too high float level or stuck float valve.
Let us know what happens if you check it out.