How difficult is it to find the 9.5" track in N scale?  I'm looking on ebay and other places but the tightest I've seen is the 11.25"

I am working in HO scale.  I've thought about doing N, just because it would give me so much space for buildings, scenery, etc.  But isn't N scale structures and rolling stock quite a bit more expensive?

And thanks for the input.  I am now considering just doing a point to point layout.  I honestly don't care a great deal about how the train runs.  I get more enjoyment out of building and decorating the structures and working on the scenery.

So, in other words, I'm screwed and just need to start all over?

I'm fairly new to model trains.  I just built a platform for my layout.  The platform is L-shaped, with both legs of the L being only 2 feet wide, because of limited available space.  I am looking to do a single loop around both legs of the L.  I know the 22" curves are too large.  Am I going to be okay with 18" radius track, or do I need to tear down my platform and start over with more width?

Thanks for any help I can get.