In this market I wouldn't really consider an ARM, because as you are aware, home values could be lower when your ARM is up, then you'll be stuck with a rising interest rate and no ability to refinance it or sell the home without having to bring in a lot of money to pay down your mortgage. But it's also possible you would be paying down enough principal to where you'd have some equity too. If you were in Southern California I'd tell you no way, buy with a 30-year fixed, but in NoVA you could be OK with a 5-year ARM. I'd look into a 7-year ARM too, rates aren't that much higher than a 5-year. Definitely think about making plans to live in it for longer though, you don't want to get caught not having a plan... those who don't plan usually fail.
If you only have a small down payment, and it would completely deplete your reserves, I'd recommend you go for high LTV financing... with conventional financing you are going to have to put down 5% due to the NoVA area being in a declining market. With FHA you just have to put 3% down, but can get assistance with that through
www.getdownpayment.com or
www.ameridream.org. FHA is trying to outlaw those, so we should have some updates on that later this month.
If your wife is a teacher then she could be eligible for teacher programs, those are usually specific to the county/city you are buying in, so I would call the housing department up and see if any are available. There is that teacher next door program where you can buy homes for very cheap, but most of the areas aren't too desireable from what I hear.
Free Mortgage Advice & Pre-Approvals (FHA, VA, USDA, Fannie, Freddie, Non-Prime, Construction, Renovation/Rehab, Commercial) since 2002
Located in Southern California and lending in all 50 states