Before discarding the 1000 series cars, investigate whether they can generate revenue by being repurposed into upscale catering and special event facilities. Invited guests would board downtown and be transported to a yard or storage track for the duration of the event.
The DC area spends significant funds on upscale catering and entertainment. Costs for the retrofit would be recouped, or the concept could be outsourced to a private investor/caterer. Ample staff would assure the safety of guests despite the age of the rolling stock, and would be trained in yard evacuations as needed. The party would go on despite any rail traffic delays, and invited guests never have to worry about how to get to the party... it picks then up! Guests would board at specific stops and doors to have minimal impact on normal rail operations.
For right now, the initial 6 month 100k goal is to explore feasibility and preserve candidate rolling stock.