We've done quite a bit of research on the feasibility of adding a generator to the camper; but the main need for it would be to avoid the long lineups at festival. With our "medical appliances" we simply can't go to the fest without AC electricity, and it means spending a month in lineups to be reasonably assured of getting the hookup.
Unfortunately, running a generator of any kind during the festival would be (IMO) extremely rude, so there's no affordable way of getting equipment quiet enough to be a satisfactory solution for our small wheelie. Larger campers can have built-in propane generators that have "tolerable" (but still annoying) noise levels; but a usable unit for our little kit would be a third of the original cost of the camper (~$6,000 or thereabout, with the necessary added propane tanks).
For a stationary unit at a home, it might be worth noting that a consensus opinion is that anyone getting a 7.5 KW or larger unit (but still smaller than a "standby power" unit) should look seriously at one promoted as a "welding generator" rather than the more common utility kinds. Durability, reliability, and better ability to handle surge loads are the main points of differentiation, although nearly all of the "welders" I've seen do have electric start. Good welding generators also run 30 to 50 percent heavier than the utility models, but can commonly be bought "on wheels" (mounted on a trailer).