/diy/ - Do It Yourself

I'm coming here from /o/ with an idea for a /diy/ project because the product at hand is sold at a ridiculous margin.
The item in question is bluetooth comms.
I have a schuberth helmet which can integrate pic related but it's 200€.
Now I'd like to make a bt module + amplifier that fits into a 3D printed enclosure to insert into the helmet + a small battery pack.
I'm looking into https://www.qualcomm.com/products/csr8645 as an SoC to use and develop a custom board, maybe even reverse engineer some cheap bluetooth earphones that use this chip. With a decent lithium battery I'd comfortably get 8h+ of talk/music time.
I have the soldering equipment and a skilled person at work and if I make a prototype on a breadboard it would only need programming (I have plenty of friends who I'll force into programming for a case of beer).

With that out of the way I'm open to any and all suggestions for this project.