My first question would be: are you gonna finance the operation?
My second would be: I semi-proto-freelance, so what's the big deal? yes that's a westbound intermodal behind 3 new GE's meeting a mixed freight behind a Big Boy while a Westbound Broadway Limitd blasts past with a GG-1 and E-60 on the point...
I've about 280 cars at the layout, inclouding staging. Changing all those cars would be time consuming. So I prefer to run my "mixed era" layout. Most cars are for 1970, but there're a few billboard reefers, mather stock cars and more.
Wolfgang
Pueblo & Salt Lake RR
Come to us http://www.westportterminal.de my videos my blog
From the far, far reaches of the wild, wild west I am: rtpoteet
Modeling the N&W freelanced at the height of their steam era in HO.
Daniel G.