Simple floor plan, but very functional. Might want it a bit bigger and I would want a bonus room over the garage. Maybe the master suite there instead? Also would have a full basement, so bedrooms could be moved around.
As a business major and complete dork, I disagree. However I do know that the idea of writing a 15 paged plan isn't appealing to most people. Unless you are applying for a loan, you don't NEED a business plan, but you should make a mini one.