Hi , the answer to your question is $100 for 3 pcs of PCB sampling . The prototype can be manufactured . I am an electronics engineer and embedded expert. I have done similar projects in past .
Relevant Skills and Experience
Electronics , circuit designing, microcontroller , wireless , designing . C++
Proposed Milestones
$250 AUD - Initial Milestone ( Research and report )
$300 AUD - Bill of materials , prototype development and programming
$200 AUD - Documentation and Handover
Additional Services Offered
$1 AUD - 3D printing and designing
$1 AUD - PCB manufacturing and desinging
I would like to discuss more about this project . Feel free to message me here.