The "Gorilla" has one transport wheel Phil, at the front. You lift the machine and push it like a wheelbarriow to the workplace.
Its not as good as a wheelbarrow wheel, so it would be difficult to transport over loose soil etc.
You lower it for wheeling to the job, then raise it out of the way for operation.
Mine is 60cm (2ft) wide with the outer tines removed.
It has a reverse gear - absolutely essential when you are using such a big heavy rotavator. At the end of a row I can either do a 3 point turn
to rotavate the other direction (good for use in your field) or put in reverse and get to the start of the row (OK if short rows).
Hope this helps!