The visa thing can be an issue, if you're going to work for someone here make sure they will help you with this. However, so that you know what you need make sure you research the visa issue on your own. A 90 day visa is not a problem and I saw six month visas being offered through the Vietnamese Embassy in Cambodia, but nothing about one year visas or temporary residence cards. Of course you are probably aware that you need some sort of visa in advance just to gain entry into Vietnam.
Doug RiceSome 30 years later I found myself back here again [in Vietnam] on what was to be a short visit that lasted months, and since then I've been living my life with one foot in Ho Chi Minh City and the other in Fair Oaks, California.
Doug RiceOverall the cost of living in Ho Chi Minh City is cheap and if you can stay away from Western restaurants and use just local products in your everyday life it's really cheap.
Doug RiceIndochina gets into your blood and once you have a taste you'll find it's impossible to stay away.
Doug RiceI'm always hearing warnings about keeping your belongings close to you [in Ho Chi Minh City] as thieves who ride motorbikes are adept at snatching things off a person as they ride by, but I personally have never seen it. Funny though, I don't hear folks talk about pick pockets but it's happened to me twice. Beware of that cute little sweetheart and stay away from those talented little hands.
Doug Rice