Just wanted to make sure you got the answer you needed.


Now for the trolling (actually not):
Considering the equipment is installed in such a way as to make it difficult to service. I would point out how much money she has already spent in labor to work on the system over the years. She's not saving anything and slowly has payed for a slide-out rack system that she still doesn't have. And will continue to pay extra labor every time the system needs servicing, that could have been spent for all kind of upgrades.
If you are felling sorry for her and giving a discount on the labor every time you service the system, then you are losing out. Either way, someone is losing out.

My only other thought is if she is hot and you are trying to play the hero. Then just buy her a rack and receiver, then you can 'put it in' :)