dear sir,
I've designed and prototype d similar circuit but using RF communication not bluetooth, means longer distance communication, also used vibrating motor " cell phone motor", so can do this for you also
But i need to get an estimated size for the PCB you need, to design accordingly
Also, what kind of battery you planning to use?, coin battery or bigger?
i can prototype that for you also, but just give me answers for my questions, and time frame to be two months maximum
Don't hesitate to ask any questions you have to me,
Thanks