My 13000w propane (Tri-fuel) will power my 4K sqft house so long we don’t use the dryer, microwave or stove when it’s on. I’ve got soft start capacitors on both my 5 and 3 ton a/c’s but still need to set both to 60deg when the gen is running to keep them from cycling on and off (or just use the upstairs one) to keep the load down. I get about 6 hours per propane tank (have 5) so can run awhile before I need to add gasoline or connect to the gas line in the laundry room to power it indefinitely. I think the whole setup cost me 2-2.5k including gen, cable and electrician. Beats the 15k quote in got for a Generac (as my gas main is on the opposite side of the house from the breaker panel…) only pain is it isn’t “instant on” as I have to turn on the propane and flip the switch on the breaker box but that takes less than a minute…. I’ve also added a few UPS’s to my mesh wifi so that never goes down and can run some stuff interrupted until I fire up the gen. Luckily my gen sits in a covered pool house so I don’t need to wheel it out of storage and all I have to do is turn on the gas and fire it up…