Sounded a bit sarcastic at first, but actually on reflection could be worth a try.
(Beats going to the library and searching through books).
I would say Wood, Screws, Green Felt, foam padding and leatherette for edge rests. (string netting for pockets if doubling up as snooker/pool and poker multi-table).
Could check out the comments in this thread:
https://www.cardschat.com/forum/general-poker-13/home-made-poker-table-326689/
Cliff notes, consensus is that it is cheaper to buy than build and just the table top versions are a particularly affordable way to get started.
It is unlikely that a startup table manufacturing business could compete in the existing marketplace when it isn't even worth trying to build one for personal use.