But seriously. Is electricity generated by locally via natural gas competitive with the grid? And does it very much noise? There are a few companies that make fuel cells that convert natural gas to electricity without burning it. But I suspect they cost a lot more than what you paid for your generator. Do you mind saying what you paid for it?
Prices vary dealer to dealer. Do a lookup on Kohler 12RES and then call your local supplier. The noise is not bad, runs around 65 dB or about the same as a vacuum cleaner. I don't know about the cost vs the grid since it only runs with I test or during an infrequent blackout.