You can even use Easy Pete's house in Goodsprings, (a room in it), if you don't mind having Pete sleeping in the next room at night.
I've been "crashing" @ Easy Pete's place since I started the game. As far as squatting goes, it's pretty decent, there's a mostly free bed (I saw a Goodsprings resident sleep in it once) with a couple of containers next to it and you have a "roommate", Easy Pete that doesn't mind you are there.

It's pretty close, due south from the Saloon/Goodsprings Fast Travel landing point and you are really close to the store, saloon and workbenches.
I do miss an "official" house like we had in Megaton. It would be cool if we could have the crafting workbenches and the other amenities setup in there and maybe a fireplace that can be used like a camp fire.