You certainly could try that for a small sample taste, but as you said it's hard to swallow the cost long term. There are places that rent trailers, and some also have pickups, but dealing with two rentals will likely run the price up.
A totally different approach may be more economical long term.
Buy a small motorhome, either A or C, and lease it out for the times you will not be in the US using it. And plan ahead when you want to be in country to use it. Depending on where you will be visiting you can then rent a jeep while in Utah, or a small CUV when in Ca for a few days and only pay for that for the days you actually need it.
