I feel that for your situation, and reading through your previous post last week about the box truck that you should go with the utility body.
I have a 2006 GMC 2500hd crew cab 6' reg bed, and I only get 10mpg with the 6.0 engine. You may want to think about getting a utility body with a diesel.
If you really want to upgrade skid steers for this season, maybe that's what you should do because if im not mistaken you've been wanting to upgrade for the past few seasons. You can always try to trade the skid steer for a nicer truck and have the person with the truck add in cash. Then you can go buy a new skid steer, or used and get financing.
There is an Old Blue Chair for each and every one of us, we just have to find it.
2006 GMC Sierra 2500hd crew cab
BOSS 8'2" Power V
Hustler X-one 60"
Toro Proline 36" wb w/t-bar controls
JS46 22" walk-behind (wouldn't recommend)
Shindaiwa T254, Echo trimmers, chainsaws, pole hedge trimmer, pole saw, hedge trimmer
Shindaiwa 633 and Husqvarna 130BT blower