train lover12part of what i like about this layout is that i can build it in sections that can be taken apart and stored against the upper wall when not in use. i could probably also make the legs removable and store it under neath the staging yard so that it would take up no more space than a 13' long shelf layout. And as for when i am operating it, that would almost entirely be done from inside the donut. No offense but I think that is much more workable than the plan you proposed.
I think the HOG-inspired plan certainly is buildable for a beginner. It is the "taken apart and stored when not in use" aspect I am somewhat sceptical about. There is a significant difference between a layout that can be disassembled occationally (e.g. to be taken to a modular meet) and one that must be disassembled and assembled every time you run trains.
The most obviously workable plan so far in all your threads was probably this one:
It is of a size you can fit into your room. It can fairly easily be stowed away in a corner if/when necessary.
It has enough variety to allow you to run trains in quite a few different ways. It has a couple of sidings so you can do meets and passings. It has a little yard, that also can double as interchange tracks.
It has two distinct scenes and a workable scenery plan. If you want to add that river you were talking about, you can easily e.g do that in the upper left hand corner, letting the branch line cross over the other line and a river on a bridge of some kind.
If you get ambitious after doing phase 1, you can fairly easily put up a shelf down along the left wall for a mine branch.
But you have to decide for yourself what you want, and go build that layout.
Smile,Stein