Thoughts
Guitarist,
and the other is an L-shaped N scale switching layout inspired by a local switching company, which has 5' and 6' long sections. I have had trouble settling on a plan
I've experimented with both roundy roundy and switching under similar limitations as you describe, and I found the switching much, much more rewarding. Your switching layout still has a curve so you still get to see the nice effect of lots of stock going round a bend.
I also have an Atlas GP35 that my parents got me for Christmas (undecorated so that I can put it in my own paint scheme - probably my "Big Country Rail Link" paint scheme from my Trainz railroad of the same name), so my motive power is taken care of (although it isn't all that prototypical. Still, what's a guy on a budget to do?).
Your railroad your rules and they sound like good parents. In future, would something like an SW1200 let you fit more wagons into the mix? Being about a half the length of the GP or smaller.
Before painting the loco or weathering anything, consider getting cheapo plastic toys from a thrift store and trying out techniques on them first.
As far as benchwork goes, I'm thinking about getting a couple of folding plastic tables from Walmart and gluing a layer of foam on top of that. Has anyone ever tried this? I'm not sure if that's advisable or not. My (future) landlord is kind of strict on power tools, so I'm trying to figure out how to create benchwork that is both portable (as I only have one more year in college and will have to be able to move the layout) and will require as little power tool usage as possible (so that I don't get in trouble!).
You can get surprisingly sturdy foam, but these folding plastic tables worry me because the joints might be loose or get loose over time, then the loco might shake the tables causing derailments, or even worse, something you love dropping on the floor. I use IKEA kallax shelving units (no power tools needed, fairly bulletproof, you can use the shelf part as a shelf, lightweight, fit in a car) but can you get these where you are?
a team track, and probably some kind of liquid-based dealer (I also like tank cars, and they are EVERYWHERE on the SSC). I may also include a scrapyard (the SSC serves two),
Team track is a good shout because you can offload lots of different cargoes there and you can make it with a simple ramp or boxcar minus trucks plus matchstick timbers with open door and little man standing in it.
If you want to do a scrapyard look on ebay for pocketwatch parts. Millions of little wheels and bits of metal that fit right in. Also dip roughly scale toy cars in paint stripper for scrap cars perhaps.
I don't yet have a power pack/DCC system, but I am planning on purchasing a DCC system once I have the money (I'll probably go with Digitrax or NCE).
Are you sure you need a DCC system for a fairly simple switch layout with usually just one loco moving around? Think of the money you could save and spend on rolling stock (plus stocks of paint, styrene, plasticard, etc, etc). Caveat emptor, I have never gone anywhere near DCC; if I could make lights come on and whistles sound I might revise my opinion, but having never been able to do this I don't feel the lack of it.
Best of luck and whatever happens please tell us about it.