There's a lot of great strategies for Texas. This state is possibly the best state in the country for investors. It is AMAZING!
I have an investment property in New Braunfels, Austin, and many in San Antonio. Great markets to invest in! The I-35 corridor is great I would pay a lot of attention to San Marcos / Kyle / Buda in neighboring Hays County and I think Seguin and Northeast San Antonio are great too. The I-35 corridor between San Antonio and Austin is the fastest growing corridor in the country. That's going to have some great rent and equity appreciation.
One thing to keep an eye out for... from my experience, suburbs can suffer a lot during a market downswing and sometimes even more when a major city crashes around them. Suburbs are even more dependent on the biggest industries in a major city. A city like Houston would likely swing back around in due time even if it has a crash in the energy sector because of its strong medical, education, labor, import / export shipping ports, technology, etc.
So to break down Texas... you're most likely going to want to invest in the major cities.
San Antonio - Best city in the state to invest in my opinion. Its prices are low and the economy is growing at an incredible rate. San Antonio is constantly underrated and overlooked yet it is making some of the best investment returns for me by far. I can still buy inexpensive, rent them very quick, and my rent and equity appreciations have been amazing. Underrated like the Spurs but always impress!
Austin - Second best metro to invest in. It is a little riskier because it is pricey but if you look in the suburbs (Round Rock, Pflugerville, Kyle, etc) you can get some AMAZING deals and capitalize on the beyond ridiculous appreciation Austin is experiencing right now.
Dallas - Third best metro to invest in Texas. Great sectors and tons of growth. You never go wrong with Dallas and full of great places to get great deals.
Houston - Great growth with fracking and energy growing it is the oil and gas capital of America. It's going to be a great market to invest in but there is a tiny bit of risk with a drop in the energy sector and a potential hurricane too. Most houses there get hurricane insurance however that's an extra expense.
Good luck!!!