RV = Repair Vehicle?

We are currently encamped at Sedillo Hill near Edgewood NM.  We would have moved on by now in our travels but the transmission started acting strangely as we entered New Mexico and got worse as we approached the East Mountains just shy of Albuquerque.  When slowing for a stop, the engine would shudder and die, and we soon realized the torque converter was staying locked instead of unlocking at low speeds.  We limped into our wonderful friends' yard and found the Ford shop (our Bounder is built on a Ford F53 truck chassis) would not be able to entertain our problems until almost 2 weeks away.
THEN, while enjoying our friends' hospitality (and driveway), on a warm afternoon several days ago, when we turned the air conditioner on, instead of cold air, all we got was a terrific growling noise.  The A/C had been balky and I had lubed the bearings on the fan motor several times over the last couple years, and apparently now had burned out completely.  Calling around to various suppliers revealed another heavy outlay would be required.  An RV, with its relatively thin walls, cannot survive warm days without Air Conditioning.  Or at least its Occupants cannot, including yours truly.
I was able to man-handle the removal and installation by myself, with the help of tools, of course.
The entire roof mount assembly must weigh over 100 pounds which I could barely lift except one end at a time.  I used one of our stout cargo-straps to lower the dead unit over the side of the RV and down to the ground, very slowly and carefully.  Using  a dolly I was able to maneuver it across the yard.  The Central Trailer Supply where I purchased the replacement had several "exact replacement" units in the warehouse and the worker used an electric forklift to load it into my SUV.  Back at the defunct RV again, I unboxed the expensive gadget.  It was mounted on a small wooden pallet.  I borrowed my friend's extension ladder and extended it as far as possible to lean against the roof of the RV to provide a sloping ramp.  I again used another cargo strap to armstrong the new unit up to the roof:  VERY slowly with a lot of grunting and groaning and hoping not to lose my grip.  It all worked, I finally hoisted it over the edge onto the rooftop, and no cuts or abrasions to either the A/C unit or ME.
I was dismayed, after all this effort, to find this "exact replacement" had no bolts or screws or anything else to facilitate installation, AND the existing hardware from the previous unit did NOT fit.
The electrical hookup and connector were the same, thankfully, and I was able to turn it on and find that it blew HARD and COLD, just like it should.  But bolting it down...... had to wait for morning to go back to the supply house.  BAH
I refuse to disclose the exact amount of damage to my checking account, but this incidence does remind me of the similarities between RV owners and Boat owners:  B.O.A.T. often stands for Break Out Another Thousand.  We await the expense of the transmission repair with great trepidation.
I have already crawled underneath and around the engine and transmission compartments looking for vacuum leaks and loose wires.  I have found and repaired several chewed vacuum hoses, rat-chewed wires, etc, and still the problems persist.  I sure hope the Ford Shoppe can use their analyzer skills to solve the problem, hopefully without a rebuilt or new transmission.
The weather is approaching winter conditions with overnight temperatures dropping to the low 40's and requiring heater usage.  We hope to be able to abscond to southern Arizona before it really deteriorates to dangerous freezing temperatures.