Hi Enterprise207.
We all have our different ways of doing things.
Me, I just go with the flow.
I had a rough idea of what I wanted and that was full length trains, lots of action as in running and passing by and to use my other passion of filming them.
Space was not a big problem as I was putting it into the loft but I had to first floor out the loft and insulate the best I could.
Next I built the bace boards, some at 3ft wide and some at 2ft wide depending on access to the far side of the board.
I also wanted an upper and lower level.
After some of the boards were made and fixed in place I then just placed track and points on the boards, put some stock on the track, place in some platforms and away I went.
Stand back and admire, is this what I want, if not just relay.
The other thing I tried to take into consideration was the points position in regards to the bace boards bracing.
If you are going to use under board point motors the last thing you want is a wooden brace in the way.
Take a look at some of the pictures and videos on this site and on uTube that will give you the inspiration for what you want.
Loads of people on this site will give you any help you need but it needs to be YOUR layout and design, thats the whole point of YOUR layout.
Take inspiration from others to do your own thing.
Good luck and you know where we are for your help and guidance.
Wiggy.