Your boat interest could be tax deductible (USA) !
The criteria to claim your boat as a “Second Home” (for US tax purposes) is that it have “basic living accommodations, such as sleaping space, a toilet, and cooking
To boaters, that essentially means a berth, and enclosed head
, and a galley
See “IRS Publication 936": http://www.irs.gov/pub/irs-pdf/p936.pdf
Don’t qualify? Get a bigger boat ...