I use old EeePC subnotebooks for that, which I get on eBay for about $40. Compute power, WiFi, wired Ethernet, USB, a keyboard, screen, trackpad, battery backup, and case. With a Raspberry Pi you usually have to add peripherals just to talk to the thing.

When I get one in I immediately install Xubuntu from a USB stick and do a total wipe.

(If you do this, get a real ASUS power supply. The cheapo ones with no brand and no UL certification overheat. Fires have been reported.)

There's quite a truth to that. I have used old smartphone as a dashcam with offline maps/navigation in one single package in the past.