Hello and welcome to BP @Jacquelyn Tucker! I like your strategy. My short and simple advice (it's always hard for me to keep it short when I start talking about real estate) is to stay below your means. Don't buy anything near what you qualify for. Buy the best deal on an REO that you live in and later turn into a rental. That will leave as much as possible of your creditworthiness available for investing!
Always buy like an investor. As an owner occupant, there are situations on REOs when there is an owner occupant only buying period. Those will be your best chance to buy an undervalued property as your home that will turn into an investment later. Go to hudhomestore.com, homepath.com, hometelosfirst.com, homesteps.com and reo.wellsfargo.com to see properties that are available like I mentioned. If you don't see anything you like, you can save your searches and get email updates as properties become available. Okay, I'm stopping myself now, so this doesn't get any longer.