We have lived a week now with all the fixes in place. Average temps outside have been about 112F. We've been able to hold the inside to 84F in 3PM to 8PM maximum heat period. Not bad, certainly more tolerable than the 97F before all the changes.
There's two problems though. Electric costs are very high with the inefficient units, and fiddling three units is a bit of a pain in the arse.
Fortunately, I didn't spend a lot on the current set up. About $600 for the portables, and $130 for the insulation. I am going to sell off the portables, and have a large mini-split A/C installed. I have tons of room under the RV for the compressor/condensor end. And plenty of places to install the evap and blower end inside. I think an approx 18kBTU unit will do the trick.Electric bill will go down, cooling will improve to under 80F (if we want or need).
All the inuslation I did will payoff in the winter also, where nighttime temps can be as low as 30F in December.
