I have lived on a boat before and I really like it. Now, I am looking at purchasing a boat as my primary residence. I know this seems a bit of a stretch, thus the question, can I still qualify for the $8000 tax credit for first time home buyers? I did note that "houseboats" are covered, but, what about a regular boat? I am looking for something in the 40-50 foot range which is substantially large enough to live aboard.