Firstly - if this is wrong place to post then please let me know and I'll relocate (still getting use to the forum layout).
As mentioned in my little welcome to the forum I'm looking at getting back into model railways after a good number of years out of the game. I'm now looking for a longer term project with challenges so I'm now looking at building my own layout with DCC in mind. Thinking L shape arrangement with the possibility to extend it in the future with a branch line-esque feeling to it (Southern/BR).
As I had some time free over the weekend I had a go modelling my potential layout with AnyRail (see below). Due to the need for it to be able to be moved (spare bedroom/loft) I'm kind of restricted by those dimensions. The area in front of the fiddle yard is to be some kind of industrial area?

From the above picture I'm planning on having a station in the top left hand corner, single engine shed to the top right hand corner and goods shed in the lower left hand corner. There's a small 2 lane fiddle yard hidden away.
I'm not planning to run big engines and the max at the station will be something the tendered engine and a couple of coaches / 2-3 coach DMU. The rest of the layout is for shunting.
Before I continued my designing I was just wondering if anyone could point any potential problems they see as I haven't designed a layout from the ground up before.
Also if anyone has any ideas I would love to hear them too.
Thanks for your help in advance.