I'm going to install a 20k Generac on a house I'm doing now, or well my electrician is.

Amazon.com: Generac Guardian Series 5875 20,000 Watt Air-Cooled Liquid Propane/Natural Gas Powered Standby Generator With Transfer Switch (CARB Compliant): Patio, Lawn & Garden


Natural gas in my area so the fuel supply is essentially unlimited, however it only puts out 18k on NG if you read the fine print.

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2006 CL500
1969 280SE
2023 Ram 1500
2026 Genesis GV70
2007 Tiara 3200