Modified hitch-mounted Jobox. Total cost of box and fabrication was close to $1,000
It weighs @ 250 lbs and is held in place with a bomber 1/2" hex bolt. Obviously the doors cannot open fully when in place but it does afford a lot more storage and you can mount ski and/or bike racks on top of it!
$500 OBO (Yakima Frontloaders not included; 3 cross bars are included)
Here's the exact box:
http://www.amazon.com/JOBOX-752980-Heav ... B00164VI4G
More pics available