I live in DC right now and ride, so can share my experience. @Wanderosa’s suggestion is a good one. Based on where you work, pick a barn and then figure out where you could reasonably live.
What has worked for me personally is this: I live in SW near the Wharf and ball park, and work from home. Taking Suitland Parkway I can reach facilities in Upper Marlboro, MD in 35 minutes and Bowie, Harwood, Davidsonville in 45-60.
The traffic is indeed terrible, so even working from home I still have to ride at either 7pm or before 3pm if I don’t want to spend half my day in the car. That being said, there is SO much horsey stuff to do in this area.
If you’re working in the northwest part of the city, you might be able to live in Silver Spring MD and take the metro to work. There are quite a few places to board out that way. And at least it’ll be summer so you’ll have the light and best weather in the evenings anyway.