Just switched over to natural gas and part of the reason we're considering it. Waiting on the ground to freeze so they can come get the old tank without rutting up the yard or perhaps just move it over to the polebarn until we get a line run over there. On propane you need a decent sized tank to run a generator and your house in the winter when it's cold. Otherwise the tank cools too much and the vapor pressure drops enough that it won't run. Before NG was an option I was really looking at a MEP803A diesel generator or a similar commercial unit. To me, the main added bonus of the NG unit would be the easy auto start.