The NEC from Washington DC to Perrville, MD would be a great DLC. This would include Northeast Regional trains, Acela / Aveila Liberty trains, and MARC trains. MARC trains would be HHP-8, MP36PH-3C, GP39H-2, SC-44 Amtrak trains would be ACS-64, Acela Express, Aveila Liberty
Only one bad thing about route. Because of all the locomotives and “content” this would cost a S*** Load of money to buy.
I think that would work The peninsula corridor was 75 mile so I think a third party would definitely be able to create that route.