As someone with ADHD, I think this is a great idea. Yes it's expensive, but the reason why a lot of neurotypical solutions don't work for me is because they lack design details and nuances that the ADHD brain requires. I've spoken to non-ADHD therapists in the past (great for some things!), and have also spoken with ADHD coaches and there is a difference.
Yes, 100%. A lot of the design decisions are subtle but solve a pain point and make things easier and more delightful to use. We need every little bit of help to make sure we show up to and work through these sessions.
I've also used non-ADHD therapists and other healthcare providers and it's always tough if they're not neuro-affirming. Especially before I was diagnosed and couldn't even put my finger on what was wrong.