The cusp I was on is the mismatch between my roster of locos and cars,
purchased over the years because I like the looks (Shays, Climaxes etc.),
and the long held idea for me to model mid-west US narrow gauge.
(Dinky, Bellevue and Cascade, etc.)
With age comes compromise... physical challenges etc.
and as time passed the dichotomy grew obvious.
I'll hold you in suspense as to my 75% made-decision.
Suffice to say the "basement filling layout",
is de-evolving to a standard bedroom "around the walls".
And it's simpler to retain the current roster,
as opposed to the railroad prototype preferences previously expressed.
Your excellent execution of your preferences was my epiphany.
Now to negotiate with "the boss".