We had a 45k ginny at deer camp for years, it had a chevy vortec engine and it ran off propane. we had the propane company drop a tank on our lease and we had it filled about twice a season. it used a lot of propane cause the generator was designed to run wide open even if no load was on it.
We started having trouble with the computer on it and it was 1000 bucks a pop to replace that thing. it blew two up and we got rid of it.