I have a 2003 LaserZ HP and would like to be able to do some limited towing. I purchased a Gravely tow hitch that is very heavy duty and will match up with a little modification. I would like to tow a garden type cart with turf tires on level ground. Looking to pull plant material & mulch for now. Next year I will pull the cart with an ATV. What if any rating does my mower have? Any other thoughts?