I think I have you all beat!
I went for most of my life with two machines - regular and serge.
And after 25 years, bought a beat up 66 Red Eye treadle, which was used as an end table for several more years.
Then I got the idea to fix up that Red Eye . . . I think I've been "collecting" for a bit under three years now, and I've got around 150 of them. I'm trying very very hard NOT to bring anymore home unless they actually fit an open spot in the collection - instead of just fitting into any open spot on the floor.