This is a nice thing you are doing.
BWI to/from Atlanta for 20.
When I priced this last year (but we didn't go), it seemed better to do it by bus. Not because the bus was that much cheaper, but would serve as "hotel" for 2 nights and would serve as a way to transport all the stuff that you no longer can take via plane, so it was more cost efficient. But a lower price would make a difference. It's about 12 hours drive for us.
Now the team has "joked" the past two years that wouldn't "Hooters Air" make a great sponsor?

They fly from here to there, via Myrtle Beach.