I had a sweet Kato UP Dash 8 A-B-A unit with an 11 car matching set, yellow and silver with red striping. Man I wanted to cry when I got rid of that. Like I said, no room and my son-in-laws and grandsons aren't interested. I dragged that set, and others, around with me for years, packed up, while I was in the Coast Guard.
G scale is huge, I would need my entire garage to make a layout for that.