After further discussion with my sister-in-law...
this is a 3 ton HP, not straight cool.
He is replacing the compressor for a lot more than we discussed but they don't mind as long as they get good quality service. They are dumping their service contract with the guys that said 10 days to get there.
btw.. it will be a life saver to get her AC running again, and with her failing health, literally.
Thanks for everything..