A mini skid would have far less capacity. Also, shipping would be expensive, but not undoable.
What do you figure such an attachment would sell for? (For a mini and full size)
Hell, a crane rental is what $125-200/hour say, depending on market, with a 2-4 hour minimum. I would say you could charge 3-4x that rate if you could get the height and SWL high enough to be worthwhile and versatile.
$1500?? Maybe more maybe less...What say the masses?
How tall was yours? How tall could you conceivably make it? 2 pieces maybe? SWL?
What do you think Carl? You are the authority on machinery. I really dont know at all.