/diy/ - Do It Yourself

A friend of mine wants me to help him make some smart targets for him, like they light up and you shoot them and some interface somewhere keeps score. Coverage needs to be a few hundred feet, no internet, everything battery powered.

I'm thinking stick an Arduino MKR1000, a shock sensor and LEDs on a magnetic box I can just stick on the back of plate targets, like pic related.
Have them phone home to a Raspberry Pi that broadcasts Wifi and write a little node webapp as a control interface (I'm a node dev).

I have a friend that's suggesting I use esp8266 chips instead, and another that says I should use Zigbee instead of wifi, neither of which I know anything about.

Thoughts on shock sensor vs accelerometer?
MKR1000 vs ESP8266?
Wifi vs Zigbee for this application?
How hard is mesh networking for something like this?