Hi Dagny,
Anything is possible, but from the picture, it looks like a solid suspension, no springs.
It would work okay as it is, as a slow speed vehicle, but to be towed on the road, springs would be very important.
<img src="http://images.craigslist.org/3p13o63l7ZZZZZZZZZ96213d4cc7f677a1c73.jpg">
It is an interesting thought, thanks for sharing it, might be someone here looking for just that setup!
Rob
Waiting for "someday" will leave you on your deathbed wondering why you didn't just rearrange your priorities and enjoy the time you had, instead of waiting for a "better" time to come along...