I see @Donnie Kennedy is apparently using a card or some other type of folding table for his layout. Using something like that would make my life so much easier than constructing one, or even having one constructed. I'd actually be able to take them upstairs myself and move them around as needed. That benefit, in addition to the obvious cost savings are making me think hard about that option.
Has anyone other than Donnie used a card/folding table for a train platform? If so, what were the biggest problems? Is it sturdy enough to hold most 3 rail trains moving around and operating accessories. For my platform, I would not have to walk on it, I should have reachable access to any part of the layout.