Karl,
Clearly in 4 mm scale, even with a minimum radius of 30 inches, there is not much left of your 10 feet for straight track through a small station so you will need to use a lot of ingenuity.
In my opinion, you really need something a bit more interesting than a piece of mainline track in open country or a simple through station. In ten feet you may be able to build a model
based on Alne Station, which was the junction for the Easingwold Light Railway on the four track ECML north of York. They used to hire J71s from the LNER/BR to run their train. See article and photos in Backtrack magazine for December 2006.
If this main line station is a bit too large, how about Chathill, the junction on the ECML for the North Sunderland Railway north of Alnmouth in Northumberland. This company also hired LNER locos, see
http://www.northumbrian-railways.co.uk/nsr.html
There are a number of other possibilities north of Newcastle, have a look at
http://www.northumbrian-railways.co.uk/ecml.html. This site also features a track plan for Chathill, which seems to have real possibilities for you.
Alnmouth itself was also an interesting station with a loco shed near the platforms; you might be able to squeeze it into 10 feet with a lot of simplification. See
http://www.avrs.co.uk/rest/alnmth1900.html
Colombo