Another perspective...
I have a ton of N Scale stuff, everything from rails to switches, to engines and rolling stock and buildings and people to populate a medium sized town. Someday, I'll have a great N Scale layout.
Meanwhile, I've built a modest Z Scale layout. It measures 30 x 47 inches. It has the ability to run two trains, and is fully scenicked (?). It is also fully portable.
It's like having your cake and eating it, too!! And yes, my old eyes are getting tired too, but with reading glasses and a little help with a good magnifying glass from time to time, I have a great working layout, while I plan the N Scale layout to come.
Cheers, Smitty