Low generator hours show that proper maintenance wasn't followed on the Genny. My Onan 4 manual says to exercise the genny under a load for 2 hours every month to keep the engine healthy and the slip rings inside the generator from becoming dirty or corroded. Gennys were built to run long hours so exercise keeps them in top shape. To compute just figure how many months the RV has been in service and then multiply by 2. That should tell you the appropriate hours for the age of the RV. A genny that sits will be hard to start because of fuel evaporation in the carb in addition to the slip ring problem.
We also love our Aspect but would consider upgrading to the 27K if a pile of money should drop out of the sky in our direction.