Yeah, I think most of us have had a period in our lives when we created some sort of railroad layout in our favourite gauge.
I was fortunate to have an 18ft x 20ft basement room where I could run havoc in HO gauge. I had over 500ft of flexi-track 100 laid, pinned and ballasted which wound around brick floor supports that were converted into plastered mountains with bridges linking one city and a suburban township fully detailed, as well as, a shipping dock, sidings and fiddle-yard. It was also equipped for night-mode and provision to run 7 consists at a time; 5 on dedicated lines. It took me 13 years to build it, bearing in mind that I had a 9-5 day job, 3 sons who needed to run RC Off-roaders, a wife who needed some of my time, so it left me with 2 - 3 hours from 11pm to 2am for my Train hobby. When it was time for me to move-on, it only took one day to sell it. That was a sad day.
Today, I am extremely grateful that I have Trainz for my hobby. Today, I have many personal routes that I have constructed (not just one HO gauge layout) which allows me to enjoy running trains in a far greater dimension, than ever before.
My experience in creating a HO layout has held me in good stead. It has taught me that 'Patience' is one necessary 'tool' required, just to run a few trains.
Cheers,
Roy3b3