You could give my brother a call (he sells docks/lifts) ... he doesn't carry Beach King, but could at least provide some insight on what to look for / avoid on construction.
He is based out of Central WI, he might be able to get something real cheap too and just have it shipped to MN. Mention I sent you and say we're wakeboard buddies or something, he might be able to shave some money for you.
He got me a lift for our 23LSV and saved a ****load vs. anything else.
His website:
http://www.kneedeepshoresupplies.com/