$2500 out the door for a toro t bar 32". Unless you need the gate clearance 32" gives, a 36" would be more well rounded, have twin drive belts instead of single, wider grippier tires, and a little more trim edge probably.
And yes, a 32" hauls a sulky around well, though you may need to buy the optional front weights to prevent lifting. $70 or so.
that is a good point bruce, for which I forgot to mention. The front did bounce a lot more with the sulky. Basically you could just tip back the mower, and it would remain tipped back, that is how much the weight difference on the back made
I have a 32 Bob-Cat with a 12 hp Briggs. It pulls me and my Jungle Wheels around just fine. If you get JW's be sure to mount them right and it will help keep the front end down. Mine only comes up if I'm pulling a moderate hill and lean back. The simple solution is to lean forward.