Switch Sensor PCB Design

I need a compact, ultra-low-power PCB that can read a group of simple slot-mounted switch and immediately report its state over Bluetooth. The board must operate from both a rechargeable battery and a small solar panel, so smart power-path control and energy harvesting are central to the design... (Budget: $10 - $70 USD, Jobs: Bluetooth, Circuit Design, Electrical Engineering, Electronics, Embedded Systems, Mechanical Design, Microcontroller, PCB Layout, Rapid Prototyping, Signal Processing)