Live in a tree house

I want to built a tree house, I want to make that house like a dream house… small from outside.. and big and beautiful from inside, so when it will rain.. or when it will be really cold like foggy.. It will look like a dream house… I want that house near a Sea or ocean. Perfect for Me… This is a crazy dream right?? but wanna turn that dream to a reality.. I dont know if I would be able to do that or not.. But still… I cannot stop myself from seeing such dreams…