I'm not sure that's right Mike. Taking 70+ amps out of a battery that can deliver only 80-90 total is probably expecting too much. I am fairly certain that this kind of cycling will make a good battery go bad fast.
A quick and inexpensive fix, CHY, if the vehicle is stored outside, is to replace the missing amps via a cigarette lighter plug-in solar charger/maintainer.
But here's the thing, something started using power that should not. Why?
If it were my car and finances permitted me to avoid the quick fix, I'd be compelled to follow the same course you are. These guys are terrific.
My two cents - maybe the ignition switch?
Pat