If I may ask a dumb question

Why are you not looking at diesel generators? You can buy off road diesel cheaper, Diesel engines have long lives, Diesel is combustible not flammable (I have heard the difference but can't seem to remember what it exactly is). same storage options as gasoline add stabilizer. I work construction and have used many different types of diesel welding machines as well as propane. Diesel jsut seems to bea a more logical choice. well maybe not if you don't have something diesel to use the fuel in when you rotate it. You can also use bid diesel with just a few modifications or make your own bid diesel if you really wanted to