Elliot, that is a BIG project, one that would be overwhelming to many, probably myself included, but I would sure like to have the space, time and resources to try something like that some day.
I Really understand about sharing the trains with others. I would have to sit down and think about it to count how many sets that I have put together out of my collection for various, Family, Friends and even a customer, who was as much a friend as she was a customer for the company that I work for, we had many Paralells in our lives at the time, and offered each other much moral support during some trying times for each of us. Sadly, less than a year after she met and married a Wonderful man, we lost her.
I had given my Wife and her kids a set I put together a couple years before we married, and she told me when her Father saw the trains, his first comment was "Fire em' up". Well before the first Christmas after we were married, I put together a set for my Father-in-Law, the look on his face was PRICELESS when he opened that box. He was 74 years old, and had never had electric trains as a kid. He grew up poor, and only had a wind up set, that he had to share with five brothers.
He has gotten some extras for Birthdays and Christmases since, this year I gave him a Lionel Pacfic to go with his passenger cars (the original set was freight headed up by a Mikado jr) he runs those trains for hours a day each Christmas season.
One of my life goals, is for there to be no Christmas Tree without a train under it, and I am doing my best to fullfill that goal.