I saw a video where a couple guys took them camping & abused the heck out of them . They went through several clutches, but held up surprisingly well.
I too have kicked around the thought of a minibike & agree the road legal thing came into play. If I decide to go that route I think I'll go with a old Tote Goat or Tule Trooper.
That way I can tinker & restore the little thing & get some enjoyment / frustration when I'm not riding it .