I split your post off into it's own topic. I think it'll get a lot more notice.
is a really cool trailer. It would be worth buying the trailer and having to get another tow if yours won't do it!
Check your owner's manual. You need three numbers. The gross vehicle weight
rating, the gross combined vehicle weight
rating, and the maximum hitch weight
. If your Biggar falls under all of those for your Dodge, then you're good to go. If any of them are outside the parameters of the van, you're better off looking for a new tow rig.
That will at least get you started!