Very, very wise idea!
My bootfitter is a pedorthist. He doesn’t sell boots himself. So, on an appointment, he does an evaluation, then recommends 2-3 boots. The customer orders the boots from somewhere where they can be returned and brings them in to the next appointment. It’s not as streamlined, but it works.
Mine is a pedorthist too. I originally sought him out because of that, when I was having a lot of pain in my boots years ago. Seems like such a great skillset for a bootfitter to have.