I got a gas mower and a gas string trimmer (we call it the 'weed whacker', dunno what real name is)
The engine displacement isn't anything notable, probably about the same as the Honda Fit, but it does fine for the grass. Sure beats having to get extension cords.
Only extra effort is draining the gas tank in late fall and refilling it in early spring.
The gas weed whacker is up in Vermont. Serious use there. The lawn is a thirty degree incline and is mostly rock. We use it around the driveway, on the lawn, near the dock, in the woods, everywhere.
At home, the weed whacker is electric. For the use we put on it, it's not worth having to do all the engine maintenence and mixing the two-stroke fuel.
Got like a quarter acre in Jersey, I think. Acre is what, ~200x200 feet? Think the Jersey lot is 100x100 or so. Vermont has to be at least an acre, maybe two. The house and the lawn only makes up about a half to a quarter acre, then there's at least twice that of forest.