OK shopping list so far for the build - 

shopping list

4x micro sd card , 32gb 

5x battery packs 10,000 or 15,000 mah ( $25-30 )

4x 130 degree lense , raspberry pi cam

1x ez cam (have them)

1x ez board ( have them)

4x raspberry Pi 3 B boards $35 (have them)

4x 2 ft long rpi cam cables

1x 12v voltage guage $16

4x motion sensors ( have them)

4x ultrasonic sensors ( have them)

4x WD eaststore/ ultra 1 tb hard drive $55 each ( have two)

1 x GPS geofencing and tracking device $30

Emergency cut off button $5

1x 10 amp H bridge ( have them)

1 x 50 watt 12v DC to 5v DC converter ( $12)

10 x Powerline short usb cables 1 ft ($10 per 4 cables)

1 x 7 port usb hub