OP,
Seems you are now finding out there is no perfect RV solution that handles 100% of the situations RV'rs want to deal with. Although your initial post in this thread didn't state towing a boat is a priority, it kind of sounds like it might be.
So, if having a boat is a priority, what kind of boat is sufficient? There are plenty of smaller boat options one could roof mount on many tow vehicles or one could even go with something like a Porta Bote and small outboard.
If the boat you're referencing is too large and must be trailered, honestly, your best option really is a truck and TC. Using a motorhome (A, B or C) to tow a boat is fine but there are also considerations there as well. Will that motorhome sufficiently put in/out a larger boat on a steep and possibly slick ramp? Will you want to break camp each time you need to trailer the boat?
A TC manages those issues better as you can drop your TC and setup camp, leave camp setup and go use your boat with really, a proper tow vehicle for a larger boat. Just a FYI that I do see from time to time people on craigslist selling a combo TV/TC setup that seems reasonable. They are usually older units but also carry a more reasonable price. You are correct though, trying to buy a modern TC is usually a lot more expensive that it seems it should be. The bigger TCs with a slide(s) also weigh a lot and require a very stout TV... which is good money too. Try and be patient and look for a combo deal someone is listing for sale. You may also need to travel from your local area to find something suitable.
