Thank you all for your suggestions. I did not know that such a thing as a mobile RV tech existed and I will definitely look into that. I like the idea of traveling to a nearby state where cost of living is lower and combining a re-caulking with a vacation, great thought.
The caulking is the original Dicor, and that's what I'll have put on after all the old is removed. I've used Eternabond tape for small dings from road debris and a hole from a branch when I overestimated my ability to maneuver under a tree but will stick with Dicor for the seams.
I feel much better about the approach I'm considering after hearing from you all, thanks again. Good trails to you all.