I now have a cheap Chinese 3500watt unit from Joe's (GI Joe). ... Planning to build a slideout for it sometime, too.
I also have a cheapo generator, in my case a Champion C46540 that I got from Kragens ...I made a slide-out mount for my gen using heavy-duty drawer pulls from an IBM rack-mount server. The gen compartment is between the right front wheel and door, and is open to the ground so any leaks or fumes are not a catastrophe; .... I connected a short piece of Tracpipe flexible stainless corrugated tubing between its muffler and a telescoping exhaust pipe that runs through to the far side. At some time I will lag the sides and top of the gen compartment with noise-muffling material to slightly reduce the sound ...