Fast travel to the "Monte Carlo Suites" near The Strip (it's on the left side, near an "L" shaped road). You will appear RIGHT in front of the door. Head to YOUR left and you will see a "Blue Hitch Trailer". Just behind it is the "Abandoned Home".
Fiends will sometimes randomly spawn in front when you exit it, but other than that (and the respawning exploding mailbox), it's actually a really nice play to live. Has a bed, cabinet, stove, fridge. (Fiends spawn because of the Suites, they're all bunkered up in there, which that's also another one you could use -minus the Fiends obv.)
It's really the only other place I've found that's not named after someone, or already occupied. It's the place I used for the beginning of my game. But once I got the Motel Room in Novac, IDK if I want to live anywhere else quite frankly lol.