I ran across the Actobotics Bogey Runt Rover on Amazon a few weeks ago. I thought the platform was pretty neat. I have some reservations about the motors, they look cheap. The platform itself is really solid. I’m pleased with it.
I’ve got a Raspberry PI 2 and an Adafruit 4 motor hat installed on it. There is plenty of room on the platform for batteries, sensors, etc. The 2nd blue PCB in the picture is a DC-DC converter. I’m going to use a 7.4 volt LiPO battery, and I’m down converting it to 4.5 to 5 volts.