I've been doing vision therapy on and off for about 10 months. You should be able to do 99% of it from home. The therapist is the one that should guide you through it all.

I made the mistake of going to someone who was probably under-qualified. She recommended that I see her about three to four times a month.

The next person I saw has more training (has a Phd). She recommends that I see her once a month or when I progress on my exercises.

If you have a serious vision issue and are in a major metro area, I'd ask around for the top person. They are often the people that train every one else. Although they may charge quite a bit $120-160 hr, you might only need to see them 2-3 times.