I don't know, I feel like acquiring an old machine is a rescue. It's like rescue dogs - if you have the heart for it, you end bringing home as many as you are allowed. Sewing machines poop less though.
My biggest issue is that I over estimate my ability to repair them. Not even thinking about tackling electricals right now, and i can't afford to pay some to do it. It's possible that I don't even need anything done to them, but I worry about it. So, I need to be cautious about adopting too many that I can't properly care for.
Maggie