I've built over 10 quite elaborate robots. I'm OK with using complex methods. Although budget is a problem.
Climbing over the wall will help my robot perform the task quickly.
Here is my plan:
Raise the robot platform while approaching the wall. All four wheels are touching the ground at this time.
Rest the front of the robot on the wall.
Raise the front wheels and turn the real wheel motors on (move forward).
Once the front wheels have crossed the wall, start lowering the front wheels.
Once the front wheels have touched the ground, start raising the rear wheels.
After the rear wheels have crossed the wall and the rear of the robot is resting on the wall, lower the rear wheels.
Once the rear wheels have touched the ground, move forward and raise lower the platform.
I'd like a simpler and preferably faster solution. In my experience, simpler is almost always better