As I understand it, he will have both the school plan and stay on your plan, correct? Quite honestly, I'd expect him to be able to get better PT off-campus than on-campus even if he does have access to it on-campus. If he can get the coverage for off-campus PT, it's worth considering even if there is on-campus PT.
I also think it's worth having a conversation with him about whether doing things where he'd need to have the ankle taped is really a good idea right now. He may be medically cleared to do so with the ankle taped, but that doesn't mean it's a good idea. There are plenty of things I'm medically cleared to do (and we're talking on the level of ability to walk, etc. not extreme things), that aren't a good idea for me to do. Considering how bad the current damage is, he really doesn't want to make it any worse before the surgery because he doesn't want to do anything that might make surgery go from "can do between semesters" to "need to do now" and there goes the rest of his fall semester. That's definitely a worst case scenario, but I know from personal experience that it's possible to damage your ankles even while taping and bracing it without doing anything extraordinary.
If he does choose to tape and do things like play pick-up soccer (which is what it sounds like is the sort of thing you're talking about), I agree with those who say that he should learn to tape himself. It's very easy to do, the supplies are cheap, and he could learn it within 5 minutes from a PT or athletic trainer. If you happen to have any way to contact the athletic trainer he used in high school, you might be able to get that person to teach him. Then you don't have to worry about his not having access to someone who can tape the ankle. It also means that he doesn't have to plan as far ahead. Chances are most of the times he'll need it taped will be fairly spontaneous. Unless he's going to go get it taped every day, far better for him to be able to do it on the spur of the moment himself.