Yes, if you live in one unit and rent out the rest, you are considered an owner occupant. This get's you a great deal on a loan in comparison to investors! This is the way I started in real estate. We've also worked with two buyers recently that did this (linked below is the story of one). It's a great time to buy income property! Go for it.
Yes you would! Whether you plan on using a VA Mortgage, FHA or some form of Conventional, you would be considered an Owner Occupant. A GREAT way to control Interest Rates & Down Payment required. GO GET EM!!