I am looking into buying a Gen 2 or 3 Odyssey and want to install 3 cargo boxes on the hitch (total of 40 cu.ft.) and a 4-bike rack on top. I estimate total weight to be 620-650 lbs, so let's say 700 lbs.
Is this possible? Would the problem be with the hitch structure itself? Or the attachment points hitch-to-chassis? Or chassis strength itself?
Since this will be a cantilevered weight on the rear axle - I guesstimate 1000 lbs -- will I be exceeding Rear GAWR (Gross Axle Weight Rating) published at 2840 lbs? If not, I can try to address suspension geometry with air-bags.
As an option, I can mount a roof-top cargo carrier, and lighten the load on the rear hitch by 150 lbs. So hitch load would be 500 lbs = 800 lbs cantilevered.