I have a lot of customers that use portable generator to power most of house. They have to physically shut off larger 2 pole circuits, and may have to manually flip thru well and or water heater circuits as needed, but is doable. I had that same thing for about 19 years before I installed fully auto 22kw unit a few years back. I do like the fact that I do nothing and lights come back on. I install 22 kw units all the time. They typically cost between 8-10k fully installed... depending on complexity. Mind you I live in area where power can be out for 5 days at a time. Cheep insurance if you ask me. But to each there own as far as I知 concerned. I can tell you I致e never had a customer tell me that they wished they never installed it...but I have gotten calls of thanks during power outages for the generator. Especially a few years back when power was out over thanksgiving....had lots of calls and text thanking me for installing gens.