People who say that living aboard is more expensive than living on land need to take a look at the numbers.
Seattle Area: Cheapest room in a co-op house: $399 + utilities
Liveaboard Moorage: $350 incl utilities
So... as much as you think that you are giving good advice about the moving onto land part, you may not be!
I really hope you get the new/free boat! I was raised in a trailer, and I turned out okay!