What is "a generator" of which you speak? I have four, though only two are in service. My main is a 6kw electric start propane unit hooked to the transfer switch.
One of the spares is a 1957 4kw electric start that hasn't had enough load to burn the factory paint off the muffler. It's going over by the well house, about 200' from the house, where it will be a dedicated pump set/well house heater. I like that back in '57 they hadn't made up the phony "peak power" number. 4kw is 4 kw. Maybe it will put out more than that temporarily. Not their problem. I'm going to hook it to a DPDT switch. Flip the switch one way and you are on line voltage, flip it the other way and you are on the generator. $50 on Marketplace.
I also have a 4.4kw pull start. The pull start is not that bad, but it's so noisy it gives me a headache 100' away. I use it for construction power out at the barn, and wear muffs any time I use it. Seriously, it's so loud it will drown out my chainsaw. You have to be really desperate for electricity. I bought it on a Harbor Freight closeout in 1997, before the Y2k kerfuffle ran genset prices up. $235. Hey, it works...
One of my favorites is a little 1kw camp generator I paid $149 for at Coastal Farm. It's a 2-cycle interrupter governed, really portable little unit. It will run 4.5 hours on a gallon of mixed gas. I have put a lot of hours on it camping and during snow outages. I feed it through a photographic line stabilizer I picked up at a college surplus auction for $10, which cleans up the power enough to run the router and TV.
The nice thing about multiple gensets is that if one craps out when I really need it, I have options. Even the noisebox will run the house in a pinch. It has done it.