Ok so my grandma is getting a new central ac unit for her trailer. We live in a trailer park the guy said its illegal cause its a industrial ac or maybe it was because its got r 22 in it not sure.

The morgage company is going to pay for it and the ac guy is going to just leave the old one there but disconnect it from the trsiler and put a new one in. My questions are

1. What parts other than the fan motor and the wires and small transformer thing are not connected to the coils?
2. Should i just ask her to ask him if i can have the fan motor and wires since he isnt going to drain the coils so i cant touch that part. How much copper am i lookin at with the fan motor and wat little wires are on it there is also a big wire comming outta the ac looks like xhhn or something with a x has to be copper. i think there is 2oz in the transformer thing.
3. What are the odds of him letting me have this stuff? Should i just have him take the stuff i want off instead of me doing it? I know what a ac is i know what not to touch im not stupid well on somw things maybe but not this. The transformer should b inside a pannel where the big wire is going to. Thanks anyone who can help.