You can buy a 14kw Kohler generator for about $3700.00 and that includes the transfer switch. You can run 15 separate circuits for the house and one separate circuit for charging the battery on the generator. There's free shipping and no sales tax unless you live in AZ.
Have a licensed master electrician to wire it. Also have it inspected. You would also need to have the generator programmed by a Kohler rep. The generator would run for 20 minutes once a week automatically. It will run on LP or NG gas. You need a licensed plumber to run the gas line they used Wardflex on mine. It's the yellow flex piping.
When you lose house power the generator will start
automatically. When your house power is restored
your Kohler will quit running. It makes a good selling point if you ever decide to sell. Hal