That's a hell of a price on the electric MileMarker, best I've seen is $450 including shipping at stevestractor.com
As for the hydraulic winches, be aware that there are 2 styles for each load rating, the 70-series and the 75-series. The 70-series is much cheaper and is power-in only, you have to drag the line out and it ain't easy since there's no true free-spool with a hydro winch. HOWEVER, the 70-series requires an additional $290 valve adapter kit, making the cost close to the 75-series which includes most of the stuff in the kit and also has power-out feature. The valve adapter kit for the 75-series is only $52.
Also note that you'll never see full rated load capactity from a Milemarker hydro winch with your stock power steering pump. It simply doesn't put out enough pressure (1500 psi) for the winch to put out max power, our pump is rated at 1100-1200 psi under load at idle. Not sure how much of a loss in power that equates to for the winch.
Kennedy (SEXterra) here has a Milemarker hydro winch, I'm sure he'll chime in.
Brent