Bucky knew that the ground handling characteristics of his Omni-Directional Transport was going to be the hardest part, while he was waiting for Harrier jump-jet-style takeoffs, without the Citroen or Cord FWD parts he needed. He said it always takes 3 pre-production prototypes to get it right. And everyone wanted to go to production at two. That's why he walked away from the Dymaxion House.
I've heard that tandem axle trucks do less slipping and sliding in mud, so maybe having two inline, no-steering wheels in back would be more stable. Like this:
