I did this on my 27' Ericson for ease of single handing. You'll have to select appropriate hardware for your mast base blocks, the largest issue being the forces generated. Eye straps generally are insufficient if you're looking at doing a block on a spring. The Harken mast base lead blocks are a great way to go. From there, run it through a deck organizer and back to the cockpit combing. Put some clutches up and follow with a winch.
Probably close to $340 without the winch for running two lines aft. You also might need new lines unless yours are long enough to reach.