If I had just gone with a basic table and covered it in masonite I could have kept the cost under $15 but I got plain marker board for an extra five so I figured it was worth it to double as a sign for future events.
I used some scrap wood which I ripped down to 2" X 2" on my table saw. This further reduced my costs but the estimate I gave above is for all new from the hardware store.
Step 1: Materials you will need:
6 - 20.5" X 2" X 2" table frame
4 - 29" X 2" X 2" legs (depends on how tall U want it)
4 - leg mounts with tite in hard ware
2 - door hinges or large piano hinge
about 50 screws of various lengths
one handle (optional)
table covering: masonite, luan, plastic, vinyl, or ???