Burned 3926mAh going 6.45 miles, or 608mAh/mile.  The camera system with HS-311 made it as bad as a brushed motor.  Using P200, D1000, it was stable enough to be useful, at 9min/mile.  Any faster & the oscillations grew.  It burns through tires & servos at all speeds.

So the H-King Sandstorm was a very robust solution & buggies don't require as draconian modifications as the Lunchbox.  The buggy has been the winner, despite monster trucks intuitively having more payload capacity.  Trucks are about as unstable as buggies.  

Buggies need clearance for the tires, so they're leaning towards a very long design with payload bay between the tires.

All the hobbyking models are of course, out of stock.  The prices of what really exists are more than full sized cars, when servos, batteries, & motors are considered.  Hobbyking has a loose definition of scale.

Having built up 5 vehicles now, the thrill of building is gone.  It's more interesting to solve problems with software.

H-King Rattler ARR   18"x10.6"x5.9"   $152

Narrower than the lunchbox.  out of stock

BSR Berserker 1/8 Electric Truggy Updated (ARR) 20"x16"x8"  $400

Too big

Basher SaberTooth 1/8 Scale Truggy (ARR) 23"x17"x8.5" $220

Too big

Quanum Vandal 1/10 4WD Electric Racing Buggy (ARR)  16"x10"x5.5" $101

out of stock

Trooper Pro Edition 4x4 1/10 Brushless SCT (ARR)    21.6"x12.2"x7.5" $208

Definite contender.  The payload bay could go between the tires & ride below the tires.  Motor is in the middle.

Turnigy Trooper SCT 4x4 1/10 Brushless Short Course Truck (ARR) 21.6"x12.2"x7.5" $160

Out of stock.  Plastic version of the pro.

Team Associated 1/8 RC8.2e 4WD Buggy 18.5" x12"x4.4" $500

More than a full sized car.  

The lunchbox 12.5"x11"x5"

H-king sandstorm (tested) 14"x8.5"x4.5" $110

16"x5" payload

Tamiya 1/10 Top Force 2017 4WD Buggy Kit (out of stock) 15.7"x9.8"x7.4" $194

Too narrow

Losi 1/8 8IGHT-E 4WD Buggy 19.6"x10.2"x7.1" $500

More than a full sized car.