Karen,
When potty training any dog, no matter the age, leash training is the way to go. I learned the hard way with this. A past dog followed the other two out the dog door we had in that house. I realized after he had struvite crystals & I started watching him that he wasn’t urinating when I assumed he was. The dog door got replaced with a regular door we could walk out. I now have a kennel inside a fenced in yard; dogs who aren’t housebroken or need a refresher course go in the kennel on leash. Schedule has nothing to do with it nor does neighborhood; just hook the leash to her and have her potty wherever she normally goes. You mentioned medical: I thought your vet already ruled out medical outside of the precursor to crystals?
