Early AT's had the pump rotated by the driveshaft, did that so you could push start them, but had to go around 30 mph. Then they moved it to the front, if your starter or batter was dead, out of luck. Created new problems with a locking steering wheel and have to be in park before you can switch it off. 65 Buick has no problems in pulling a 15' camper, but in 1974, picked up a 22 footer Class C for practically nothing, energy crisis, over 3,000 motorhome manufacturers went broke.
Back then was only a buck to camp, use to go to Devils Lake, had the whole park to ourselves, today, have to make reservations a year ahead and 40 bucks per night.
Good question on that 50 mile limit with an AT, if in neutral with a FWD, not very much is turning on the inside, differential is part of the AT, that would be turning splashing fluid around.
Did make some mods to both my boat and motorhome, installed an auxiliary electric fuel pump, both have carbs, and if they sit for a couple weeks, fuel bowl is dry, had to crank the engine for a good 30 seconds before they would start. Now switch on the pump first and start instantly. Other was adding a maintenance charger, diode isolated so would not discharge the battery, motorhome has three, have a switch I close for the two cabin batteries with the third so always stay fully charge. Boat just has one, but pull that battery out for the winter time.
They say the happiest day from the day you buy a boat is the day you sell it, sure have to watch out for frost and make darn sure the block and manifold has all the water removed, wanted this for my grandkids, but they have a lot more fun in our kayak.
Seems like having a dolly is the best bet, but if only used five times per year, where do you store it? Then where are the towing hooks? 04 Cavalier had them, maybe should try to find a good used one down south someplace.
Sounds like this towed vehicle already has that trailer light package, one more wire from the towing vehicle could keep that battery fully charged while driving.
Few years ago, price of gas shot up to $4.75 a gallon, motorhome stayed parked that year. RV dealers around here charge 125 bucks per hour, definitely a DIY project. See some $300,000 ones on craiglist, low miles, few years old, can't even get $80,000.00 for them. Mine is only costing me around $150.00 per year for insurance and license plates. Instead of living in a $300,000.00 home, should live in a $10,000.00 home with a $300,000.00 motorhome parked in the driveway, this way my property taxes would be next to nothing.