I do speak the language, but that only helped with finding a cheap (i.e. Thai-priced) place to rent.
There you go. Things develop at light speed down here in SE Asia!
That being said, GP's version of Vietnam living is perhaps like my Phnom Penh version: "costing as I would in Europe, but get way more bang for the buck" (to qualify---not that kind of bang, thank you very much..)
So down here I can get a furnished condo thingy with pool/gym/view/flatscreen/balcony for the same bucks that would get me an unfurnished hole without all of these in say Berlin, to not even mention other parts of Europe.
BUT, it's still a multiple of $120. If I were harder-pressed financially, indeed $120 would also rent me .. "something".
Even though it didn't really fit in to how he wanted to live his life, he ended up getting a local housekeeper. She'd basically just do all of his shopping (groceries, clothing, whatever) and pay the local price, rather than the tourist price. With the money he saved, he paid her above market rates and still managed to save money on the whole deal.
SE Asia is cheap, but its not as cheap as people think it is.