I see you asked your question several months ago, but I hope you're still in the market in San Antonio. What a great time to invest while interest rates are so low! I suggest you speak with Cheryl Darter, Senior Loan Officer at Colonial National Mortgage in Austin. She can help with purchases and refinances of Texas rental properties if you already own four.
Cheryl's email is cheryld @ colonialsavings.com.
Good luck investing!