I have a project with the following requirements:
USB port or built in GPS
< 20 USD (<30 with onboard GPS)
I currently work with raspberry pi 3, which works great, but is just too expensive. (the final product with case should cost less than 25 USD). I also have a pi zero 1.3. However, it requires the usb adapter and a wifi dongle, which makes it impractical for off the shelf cases.
The C.H.I.P. seems to be (almost) the perfect match, but it does not have a camera interface.
Any other suggestions?