I think it's much better, and safer, to just buy a used 4 wheel tractor!..
Interesting. Your comment is based on which of the following?
Personal experience operating this equipment
Observation of others operating this equipment
A particular application you have observed this equipment is unsuited to perform
Information demonstrating that this equipment is unsafe or may contain latent safety issues
Your opinion
As this is a fairly new product I am anxious to learn as much about it as possible prior to making a purchase.