No, but I have a very good idea of what it costs to procure, install, operate, and maintain a 24kW or 48kW generator. About 30-40 grand if you’re adding a sizable diesel day tank or propane tank.

Once it’s installed, you’ve got fuel deliveries plus regular maintenance and monitoring. You’re looking at thousands of dollars a year to operate your own generator for a 100A or 200A service. If you’re already installing a propane tank for heating then the costs can be spread between heating and power generation but it’s still a sizable investment.

Generators are nowhere near as reliable as you’re making them out to be. Maintaining and fueling one is a hassle that the vast majority of people would rather not deal with.

Their house is primarily solar powered.

They have no diesel generator. No diesel tank. Propane for cooking.