Turbo Trailer load limits, extracted from original brochure.

These figures are essentially the same as for the standard YRV.

You'd probably use a single axle trailer and the rule for this is that ideally the load imposed on the tow hitch by the trailer should be zero in the static situation. That means the c of g of the trailer load should be over the axle and that heavy weights should be kept close to that point. The more you stray from this rule the more ungainly will be the handling, to the point of downright dangerous!