I only have 3 & everyone around here thinks I'm crazy. (Why do you need 3 machines they ask) Well I use all 3 almost daily. I have an old Brother XR40 another Brother 6000i & my Husqvarna Viking Mega Quilter with the Next Generation frame. People that don't sew I guess just don't get it! LOL
Oh I also have a Singer serger that I've had at least 5 years & have never used it. I keep thinking I'll take the time & get to know it but haven't yet.
Someday I would love to have a embroidery machine but we'll see.