I think you get...
...what you pay for in bottom paint. A "good" modified epoxy (i.e., hard)that would last two seasons (assuming you don't take your boat out of the water)on the Bay is Petit Trinidad. An equally "good" ablative (i.e, soft)multiseason paint is Interlux CSC Micron (and you can take your boat out of the water). Petit is hard to remove when you need to; the Micron is easy. Both are in the $150-160/gal price range and well worth it.