Kevin, I suspect you'll find that the basic corrections will go very quickly once you get comfortable with color corrections and channels. I did a quick test, and the following--very incomplete--version took 3.5 minutes.
Unfortunately, what doesn't go quickly is the detail work, and "that's left as an exercise for the student" [grin] The detail work, though, is what separates the so-so job from the professional, and it can't be skimped on in Real Life.
Steps here were basic:
- Levels adjustment layer to maximize contrast. Normally, I'd use Curves, but Levels seemed easier for this image.
- Hue/Saturation layer to rotate to a good skintone;
- Duplicate and convert the dupe into LAB mode;
- Apply Image using Green as the target and Lightness as the source; mode set to normal and around 50% (That was primarily to get rid of the worst streaks, but it also put some texture back in the trees.)
- Desaturate adjustment layer, masking the jacket. (The only non-global change made--I prefer leaving the details until the end, to help preserve whateve image integrity there may be.)
It'd take me hours to really clean it up, but getting near is usually easy. I strongly second Stephen's suggestion about Dan Margulis' book on color correction; it helped me tremendously. (It's not an easy read, but it's by far the best I've seen on color and tonal corrections.)