I was thinking about some design ideas and was wondering if using a small electric motor transaxle for the rear wheels would work. Mounting the wheels would be easy and the measurements show there would be enough ground clearance. This would be a 4wd build and may have transaxles in front and back. I know this would be heavy but would decrease the amount of parts. What problems do you foresee? Steering issues? Braking?
here is an example of what I was thinking about using: