Ok. Do you rotate use of those machines?
Do what my mamma did, she took fabric sheets and sewed them together. So 1 bed was a patchwork. What the hell..life is short.
I haven't properly thought about your question..and I am an ex-sewer. (yea, French seams, cuffs, etc. Fabric made buttonholes for coats, that tailored stuff.) My tabletop Kenmore with serging stitch features, etc. has been gathering dust since I took up cycling. So I'm impressed by you.