Hi Soupy
Took you awhile before your first Post but we are glad you have now decided to join in. A suggestion is to take photos as you progress even if you make changes as you go alone as its fun to go back and see your progression.
I Bought folding tables from Walmart a few years ago. You can see the results in the video below. They are 30 inches wide by 6 foot long. I held them together by buying cheap, small, 'C' Clamps from Harbor Freight which help keep the transition between tables smooth with no bump plus they don't shift if you accidentally bump into one. Took me a while to find this type of grass as the first ones I tried the grass blades were much too high so the tracks and scenery pieces would sit correctly. It was outdoor grass so I gave those to some RV'r friends to use at camp sites.
EDIT:
Wow...I just looked at Walmart to see the current price of the tables I bought and in just a few years the price has almost doubled...Geesh
[video=youtube]https://youtu.be/7sIQq2gSfpU?si=I7Rwkm0OiaG5rk8P[/video]