I have an 08 Teryx . Only time I wish I had power steering is when I'm trail riding ALL day . You get quite a work out . If your going to be pulling implements to work your food plot , I would think a bigger engine with more torque would cause less strain on the machine . JMHO Best of luck to you .
I would tend to agree, if you are looking for a workhorse, I would look at bigger engine.
The 570 is a fine machine for trails and light duty work, but if your main focus is work, I would go for bigger CC's.
get the biggest available you can afford. you wont regret it. you may want to look at a tractor if you plan on mostly using it for working the dirt. I have both and would take the tractor any day over the ranger for field work. you can get a nice used tractor for the price of a ranger