With today's 10% minimum ethanol and all the detergents in gasoline for fuel injectors, the gas is so very clean leaving almost no residue at all. I don't understand the gunk you all are worried about. Seafoam and all that....are you certain it is needed?
I never drain carbs on any of my small engines from lawn tractor, push mower, snow blower, leaf blower, weed trimmer, chain saw, and even my RV generator, motor home and other winter-stored vehicles. I also never use fuel stabilizers. Then there is gas line anti-freeze which is the silliest thing to buy given that the national standard use of 10% minimum ethanol has been mandated for so many years now. The ethanol is anti-freeze.
I do store everything indoors or in an outdoor storage shed, never outside. They all start up after a long winter's rest and run just fine with never an issue. My motor home & generator are 10 years old, my lawn equipment is 28 years old.
I admit I don't know much about the 110v generating portion. My generator is stored in a heated garage so it's good enough for me. Brand new generators sit in crates in storage for years at a time waiting to get sold. They don't get used so I figure I am okay. I NEVER run anything over the winter if stored during the winter. All this carb-caring, engines running for hours per week effort, I don't get it. What am I missing here?
Sorry if I come on strong.