For years I sewed with my machine on a table up against a wall. My room is small by comparison to yours but I was able to line the wall with a table and but up against the sewing table out into the room. My husband put a piano hing onto the sewing table and did an extension with legs. That way I can open up when need more space behind the machine. I really like the machine in the middle of the room. My husband thinks I am taking up to much floor space and I have told him, I don't plan on dancing in the room. As long as I can get around and it suits me.
Rita