I’m so interested in the ‘big board’ concept of feeding a crowd that I looked into buying a big board. VERY expensive! I have a cousin who has a millwork shop - he has a computer driven saw & might be able to cut one out for me (I like the round ones). I did a little research on ‘food safe’ coatings for a wooden board & that is interesting, too.
Buy a board:
https://houseofhyacinth.com/collections/the-reluctant-entertainer
Food safe wood finishes:
https://vanduynwoodwork.com/2021/11/19/food-safe-wood-finishes/
Good job......your guests will be eating w/ class in no time.
https://themerrythought.com/diy/diy-marble-cutting-board/
I see a LOT of larger wooden and/or ceramic trays at my local Thrift Stores that would also work well as a 'board' for entertaining. Now I'll REALLY keep my eyes open for them.