Welcome, Gibbons! Sorry to hear you have had problems, but we can help sort them out.
RV generators are expensive to replace and often expensive to repair as well. Start a discussion in the motorhomes forums and describe your problem with the genset - maybe our collective wisdom will be enough to get it going again without a great expense.
A few people have installed tankless water heaters in their RV, either electric or propane. If you use the Search function, you should find several previous discussions.
Former owner of 2004 American Tradition and several other RVs
Home is in the Ocala Nat'l Forest near Ocala, FL
Summers in Black Mountain, NC