I commuted from PBI-MSP for 9e from March 2010-July 2011 and it yielded a few "no shows". My best advice is to get familar with the Tri Rail system, which runs between all three South Florida airports. Because it may be easy to get out of one airport, but hard to get back into it.

As of 2010, the annual parking rate at PBI was $250.00 (non-pro rated), which must be renewed on January 1st each year.

Good luck