Patrick, I can only assume that your list of to do's will have fuel filters at the top. I had similar problems just after I had my generator installed. As I run off the main tank, main feed line for fuel. The "t" inline had a kink just before one of the two inlne filters.
I also had a carb rebuild and as it was the original and had never been touched it was beyond ready to rebuild. My mechanic said the float was heavy and that the metering jets fell out into the bowl when he disassembled the carb. The numbers after rebuild where very impressive.
I spend a lot of time on my creeper under the coach when I'm home. You'll get to be quite familiar with the undercarriage of your coach over time I'm sure.
Hope you'll post some photos soon so we can see your new passion.
1984 28' Funeral Coach
Former Rolling Showroom & PuttLab (now party bus)
"I'm not an expert. But I did sleep in an Airstream last night."