Brought a table at K-Mart several years ago --it's also sold off & on at Walmart. Plastic top, folds in half when stored, and is 24 x 42" when set up. It has telescoping legs - will be full height of dining table (28") when fully extended, but drop it down to 23" and it puts my sewing surface at 27 1/2" -- so you can look down on your work easily, and not have to raise your elbows while sewing. Because it has telescoping legs, I have a short stack of plastic shelves beneath it. Did have to find a chair which was low enough to allow me to sit comfortably -- ended up with the padded folding chair from Costco -- was supposed to be temporary until I found something better -- no need!-- works great.
Minimum cost, and functions very well. Actually holds both my Sapphire and my H/V S21 serger at the same time -- put them on place mats and slide the one I'm not using off to the side.