Welcome to the Quilting Board!
You can also use a sheet of MDF, instead of the plywood. MDF is heavier but can be sanded much more smoothly, then painted.
Here is what my FIL did for me, on pg. 3 (last on there anyway lol) I actually posted how he did if for the set in insert.
If it makes you happy, it's worth the time!
I got my tables at Ikea. it was perfect because you can get the sizes you need to fit your area and they have different options to put under, draws, shelves, cabinet
You can get a better grade of plywood that is smoother. I've been quilting for 10 years and I now have a Horn table that my sewing machine sets into. I like it a lot. However, my sewing room has evolved over those 10 years. I started sewing on a desk in our guest room, graduated to a drafting table that my husband cut out the center for my machine and then finally the Horn. I actually think the door or plywood would be a good and inexpensive solution.
Thanks everyone for your ideas! Although I would love to find an old table and repurpose it, I have to move on the re-do of this room while I have the window of opportunity with DH, family schedule, etc. I think we will look at MDF tops and something to go underneath. But perhaps a field trip to Ikea might be fun! I will keep you posted!
I repurposed an office desk that I found on craigslist. If money allows, you might try a Lowes or Home Depot or a local countertop shop and have a laminate countertop made to your size. You can buy pre-made countertops, but they will have a backsplash, which I would not want.
Shirley in Arizona