Starting this or any service does run up against the problem of lack of equipment. Siemens cars need to get fixed and the problem of axel count cars is resolved by using out of date cars not revenue capable cars . That would include baggage cars on trains with loads over some figure of say 350 - 400 average passengers. Easy to obtain on some routes. Western trains except maybe the Eagle and Sunset will be able to meet these loads is capacity is available and sold. I will not even address the lack of capacity that is evident. Another item is stationing standby locos at strategic locations to back up for loco failures.
The longer trains especially out west , + Crescent, Capitol, Cardinal, Silvers, will probably need another loco to maintain schedule and back up for the many grade crossing damages that will occur. . AC traction locos for LSL, Builder and Zephyr especially needed for winter operation in snow,
East coast trains LSL, Silvers, Palmetto, Crescent NEC <> Atlanta , maybe Carolinian should be capable as well. The Capitol probably not as it has the most passengers full distance WASH <> CHI. Cannot imagine many more on that full segment.
Then we get to the possibility of another train on these routes ~ ~ 12 hours separated. Each route that can have a opposite time train reduces the overhead costs of train stations and not needing to double T&E Crew. Palmetto extended to MIA probably can enter into these loads. Maybe schedule an extra section*s with limited stops when needed during high travel times on Silver routes.