I live in an area where Huricanes and the outages can be severe. I see some people wanting 200 Amps from Generator so their Central Air, Water Heaters, As if there is no outage. Most of the people I work for don't have that much, and are happy having A refrigerator, Lights, fans, Necessities.
Plus your fuel last longer for the essientials.
Running at 200 Amps Eats Fuel.
Easiest and cheapest would be a 50 Amp power inlet on the side of the house(Generator Location) and run to panel with a interlock kit(To make safe and stop backfeeding)
Generator InterLock Kit
Then have all breakers off except all necessary and room breakers. Only have a light on when you need it, turn it off when you leave.