Phil on this site used to run a Wright ztr so may be worth asking him.
The other option if you just wanted to use the ute would be one of those big WB's like the yanks use. Youd need some long ramps but probably wouldnt need a trailer. World Lawn have a WB here but made in china etc I believe. Best looking into a better brand. Im sure I saw a Hustler in the back ground of a photo of a used SZ that was for sale recently. Long story but just saying they may be available here. I dont think they have the VX4 deck on them, not even sure what size they have either but excellent control system by all accounts. Probably to big actually!
I still dont understand why more larger WB's arent here in Aust. If you have a 1/4 acre block and can access the back yard, they would be great for cutting time. But, they would be up around $7 or $8000 I reckon.
Toro may be coming out with s 30" pushy with a bag. You may of seen them already. You wouldnt get the domestic version like this ...
http://youtu.be/TJEQ1EYyo0w but the commercial one may be ok. There only new and would be very expensive and maybe the engines to small as well. Just putting it out there
Ferris have a sit/stand on machine. Rides like a bike kinda thing. they look sweet.
Im sure someone on here bought a Toro stand on. maybe try searching and see if you can find anything.