We already built a little 80x200cm transport cart for film work, this is it:
it was a first proof of concept prototype built out of cheap parts lying around and a lot of machining and fabrication to make it all fit, like forklift motor, lawnmower gearbox, quad axles, etc ..
build thread for that can be found here: Small electric car self build - Endless Sphere
Now for the next one we decided to keep the general layout/design but switch from a handmade tube space frame to a computer designed and cnc cut unibody chassis and also switch to qs hubmotors.
this is the final design:
the waiting time for the lasercut steel was bridged by building an interchangeable 100Ah 48v LifePo4 Batterypack using flightcase hardware:
..and we did the first bit of metalwork, the thingys that hold the 4 qs hubmotors: