I must say you are an exception. The average price for full house natural gas
generator installed is about $11,000 and a 4-6 month wait we had one installed in Mi last March. We got 3 quotes and l asked around and yep that is the going rate.
You installed your own and it’s only 11k and it’s propane maybe that’s how you got it done so cheap but you would not be typical.
What size gen does $11000 get you? My 11k runs everything in my household. I don’t have access to NatGas so propane is my only backup option to gasoline.