I've been trying to find a suitable layout for my limited space. I live in a small apartment, and the biggest size I can "afford" right now, would be 4'x8'

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I've just discovered AnyRail and I like it a lot. Playing around a little bit I came to the layout that's attached. It's N-scale, I've used Kato track, and the plan is based on an N-scale Great Northern layout that was in Model Railroader of March 2005. I've tweaked it a little bit, added some track, and rotated it.
This plan calls for a 32"x80" hollow-core door. I think there is enough track for some interesting switching, and enough open space for scenery. Inside the mountain range on the left, the track is climbing to an altitude of 1" at the bridge, then going back down to 0" by the time it reaches the mountain on the top right. It should give me enough room for future expansion.
Any ideas/suggestions/comments would be greatly appreciated.
Thanks,
Michel