Have an exit plan. Create hypothetical situations such as if the engine or transmission needing replacement. Will you still have enough money?
Expect problems down the road like ac unit failure or other less serious nickel and dime items. YES, even if it's a new rig.
They list the 293ers as 1,625 pin weight and gvwr at 12,000 If you are trying to stay within your trucks 3 measures (gvwr, gawr, gcwr) you may not meet them with a 3/4 ton truck.
I'm happy with my 18,000 Pullrite auto slider. I have a 2014 Ram CC srw CTD short bed and a flat front wide body. Depending on the nose design some may say that you could get by without a slider. Again, I like mine because I never have to worry about it. If I get in a bad spot my concentration is in wiggling the darn thing out of there without hitting anything, not on not smashing the cab.
Reflections appear to be good rigs and I'm new at FW but I'm guessing most RV's are going to be hammering the electric meter when parked in a hot environment and suck propane like crazy when in a cold environment.
Good luck to you with your health issues as I know how quickly they can change things. I also agree that cutting down to just an rv and truck will simplify things and keep you from being in an apartment or something with the issue that come with it.
Again, to me, the number one issue is not boxing yourself into a corner. Plan for the worst and hope for the best.
EDIT: After seeing Donn's comments I would also say that you may want to put the big money in the tow vehicle and by a used rv. I bought a new CTD and a 14 yr old FW. If you had to bail out, you would take a huge hit on a new rv and not as bad of a hit selling a rather new tv. If you buy a rig without water damage you next risk is the appliances with the refrigerator being the worst at $1,200 or so. With the TV you have your risk is a $10,000 diesel engine.