Seems this is just a bureaucratic technicality. What's to stop someone from selling the jig, then buying it back at some future point in time?
A) "Hey, I need a jig, drill press, etc. again, any chance I could buy it back from you for the exact same price I sold it to you?"
B) "Sure, I'm not using it anymore. Got out of manufacturing for myself."
Repeat as desired.
You could buy your friends lathe for $1, and then sell it back to him for $1.50
Seems like it has more to do with where the equipment is located. If it is on property you own or lease, having the equipment delivered there and renting it would be fine, you just can't go into a shop you don't own or lease and rent it where it stands.