I rememeber when I 1st started out making quilts, my sewing room was only 10x18 which may sound like a good size but when you have a huge computer armoire, 2 tables with machines on them plus bookcases containing fabrics and everything else needed for sewing and then there's the 2 windows on 2 walls and a door on a 3rd wall leaving only 1 full wall. Plus later I added a 10ft quilting frame with machine in the center. I used one of those folding tables from JoAnne's when I needed to cut fabric and even then I acquired quite a few bruises on the hips getting around everything. As I'm in my 70's now, getting on the floor isn't going to happen if I want to get up again by myself.
I'm happy to say I now have a larger sewing room down in the basement in this house and even then, its seemed to have shrunk on me. I went from a 3x4 cutting table to a 4x8 and the quilt frame has gone from 10ft to 12ft and deeper due to a larger machine. But I have downsized my machines though I still have the extra table to lay stuff on when I'm sewing.