I just checked daves smiths site, he has several Tradesman Ram Duallys, With Cummins, And Aisin Trans with list of 55K (The Cummins and Aisin adds around $11K).
you should be able to knock that down to around 42. but without searching his inventory, that truck apperas pretty basic.
nice options (that did not appear to be on that truck) is the package that adds cloth seats and carpet = around $700.
transfer case with electronic shiftier (on dash) $250.
Uconnect 5 which gives you a better radio 600.00
remember, if you got time I hear its running 4-6 weeks to special order a truck the way you want it.
Yes you can set 3 across the front seat on the ram. but there is one high end seat option with center console that I think makes the front only fit 2.