I'd suggest a cheap setup like the CC400 or 401. This way you could see if LF is for you or not (unless you already have in which case ignore me. Most people do anyway....).

If you want a truly cheap, but good setup to try and work with, get something like the CC400/401 and a Graphic board adapter. This will let you buy cheap Graphic lenses that are already mounted which you can just pop on and off. Not exactly the latest and greatest lenses, but they are very servicable and great way to start.
And you can always sell them later....