I am frequently asked which device to pair with RACHEL when setting up a lab. For any sort of remote location in the developing world, I encourage you to find devices which have at least these features:
11.6" screen (larger drains the battery quicker, and power is usually your biggest problem)
2x2 WiFi (important)
Put the devices online a couple of times. Buy a clean version of Windows and provide that along with a product key to your community so that they can reformat the devices as needed.
Currently, the HP steam seems like an adequate device: https://store.hp.com/us/en/pdp/hp-stream-11-ak1020nr
This is not my area of expertise, so if others have a better suggestion, please chime in!