My RV shop says my 2012 37 foot Thor Class A motorhome needs removal of the old caulking and re-caulking. It's about six years old and has not been garaged or covered. No leaks so far, but the caulking does show some defects and separation. They figure six hours or so and $1000 to do it. Is that in the (California) ball park? As an alternative, how well does adding to existing caulking work? Thanks.
Craig