First, if you haven’t hired an agent yet, use Redfin. Seriously. They saved me tens of thousands of dollars in buying and selling a house. Actual, real money.
Second, in DC, I think you are well served by being patient and decisive. You’ll see a lot of houses where you will think, “Well, this could work…” But eventually, you’ll find one that speaks to you: “I know I’m not getting everything on my list, but this one hits my top priorities, and I want it!” Then act FAST!!!
Spend some time now gathering all your documentation for your loan - pay stubs, tax returns, the forms where you have to declare if you’re getting a gift to cover some of the down payment, and more. Just every damned financial thing you can think of, get it organized, so you put your new pay stub in that box or folder or whatever. Getting all that together is a huge pain in the ass when you’re being pressured by your bank to get everything in to them likerightnowthismoment after your bid is accepted.
Look beyond the color of the paint on the walls, obviously, but also keep an eye out for things that you might want to fix or upgrade when you eventually have the money again… and don’t fool yourself that it will be cheap. Sprucing up that stale old kitchen with some new appliances… and maybe nicer cabinets… and wouldn’t it be more functional with an island right there, or opening up that wall a little? BAM! $40 grand.
Finally, spend a lot of time thinking about schools. Boundaries in DC shift over time, so keep that in your calculation. Like on the Hill, you might find a house where you’re inbound for Brent – fantastic! Oh, wait, that line for Brent is actually drawn on your street. In a couple years, that line may very well move a block over so you’re inbound for Tyler. Not good news. ETA: I differ with CaffineAddict in that in some parts of DC, the area for a quite good school can literally be right next to the boundary for a very lousy school. But since you’re likely to move before middle school age, this is somewhat less of a problem, because some good elementary schools feed into lousy middle schools.
Frankly, I wouldn’t be very worried about the house losing value over the next decade.