Copy of an earlier post.
As the trailer is rigidly fixed (laterally), some countries regard this as being integral with the towing vehicle.
I have a motorbike weighing 105kg and I have both a tow bar mounted carrier and a "castor wheel " carrier, both used with my previous motor home. If you do the maths using the principle of levers round the fulcrum of the rear wheels of your van with a normal load in place, you will be able to determine if the load is within acceptable limits. With my previous motor home, depending on load carried, sometimes it was and sometimes it was not. I bought the tow bar mounted rack first, then found (by being put on a weighbridge) that I was overloading the rear wheels when in full long term holiday trim. I think it unlikely that the tow bar mounted rack will work with the Cali. In any case, do you want to open the tailgate? In my view a trailer would be a better bet, but it does have some disadvantages, especially if your reversing skills are limited.
The attached pic is of my "swivel wheel" trailer which is a Hydra Trail Easy Lifter.