[straybullitt]

I can't help you with finding any affordable track days in your area, but have you ever done any autocross events?
It is a fun and relatively inexpensive alternative to a track day, and you can typically attend an entire season of autocross events for the cost of a couple of days on a race track
And it is a great place to meet other enthusiasts who will know about the most economical methods for enjoying days at the track.

 

[straybullitt]

Just Google Northern Virginia autocross.

You'll have a great time!
It is a good way to learn to drive your car at it's limits in a relatively safe environment. That way, when you do get a day at the track, you can make the most of it.