Here is my suggestion based
Here is my suggestion based on you needing to move ever few years.
Start by laying out some basic benchmark shapes. The reality is there are a lot fewer bench work shapes for a given space then layout designs.
Start by locating spot to put a loop on either end. Depending on what you want to run that will take up 4 to 8 foot diameter each. That is going to be the major restriction in you design. I would also locate a nice space to build a work bench/desk.
Given my choices I would locate it off to on side were I couldsomeday locate a branch above the desk if I ever get that far.
Now once I have this worked out I would fill in the space in between the loops with 2' x 6' modules. I know 8' is more standard but sometimes anything over 6' can become hard to get into your next layout room.
Once you have this in your head or down on paper I would build the work bench.
If at that point you still are not sure what to do I would start building sections and installing the. I would use plywood frame as it is tough enough to survive a move. I would put cheep 1/4" plywood on top of the sections. That way if you change your mind on the next layout you can pull the plywood off the frame and reuse the frame.
Note I have said nothing about the track plan. Hopefully buy the time the sections are finished you will know what you want to do. I would use the Layout Design Elements idea and pick one element taking up one to three sections and make that really nice. I would just get some track running on the breast of the sections and I would make the return loops and any staging tracks on open grid because big loops are to hard to move and odds on won't fit in the new space. I would also do the same for corners unless your LDE needs a corner. Corners never seam to work from one space to the next. And there is,no point in spending time and money you don't need to on areas that will be pitched when you move.
Once you have one LDE close to finished if you have time you can rebuild the track on some more sections to build another LDE.
But in the meantime you will have started construction while you are thinking about what you want to do. No matter what you come up with most of the benchwork is the same. And if you need to change the bench work you can pull out a section and build another.
I would also suggest that you put a master power toggle on each section for track power. This helps in finding shorts and it keeps all the wires for a section self contained for when you have to move. This toggle can be hidden under the Layout as you won't use it much.
When wiring the Layout you run bus from one terminal strip one one section to another terminal strip on another section. With the toggle coming off that and going from the toggle to the Layout.
You can pre,wire this bus before you have the track figured out if you get that far with out a track plan
When you move you protect the LDE and any other sections you will reuse as is and you strip the rest back to plywood or down to the frame and just reuse the farm at the new house.
If this sounds like I may have done this... well I moved from my apartment to condo to a house and the three apartment sections are reused in the house after stripping them to framework. Several sceniced sections from the condo are used as is in the house..
-Doug M