.A 70ma drain is normal loss? Only car I've had with loss issues was, wait for it, my 528e. Normal drain was ~ 20ma and if the car sat more than 2weeks it would need a jump. Regardless, I'd do 2 things. First go higher up in Subaru. At the same time, have her find an auto/electric shop to permanently install a tender with a plug just out side of the hood. Now for your friend. Next is for her to find an outlet in her garage and maybe an extension cord. There's a limit to being "done" for. Gee Whizz!!