Greetings,
An interesting and involved project indeed. It's and end to end product design - involves sensors, embedded systems, circuits, ergonomics, mechanical design, WiFi/BT, web programming. I have got good expertise with most of these areas. Please see my profile for details.
However to be honest - I am not an expert in ergonomics or mechanical design - though I do understand those well. So I think I can assist you in getting a MVP of this product. But it would certainly require more discussion in scoping out on what all has to go in the MVP and expert inputs from somebody on your side on ergonomics and mechanical feasibility of the physical parts.
This is my initial bid only and based on the scope we finalize - will update the bid accordingly. Also it does not include any hardware cost involved - that can be on actual. Look forward to hear from you.
T & R
Alok Pugalia