Q1: You mentioned taking a capital loss if you had to sell? Have you had a market analysis done recently on the price? Obviously Austin has taken a hit on prices and continues to be soft at the moment. I would make sure you know what that $ is at the moment and the potential DOM risk before making the decision to keep it vacant chasing a price you can't get.
Q3: I'd be happy to do a CMA and underwriting for free if you'd like to DM me the address so I can give you a more precise opinion. I think that's the only way I could give intelligent advice on this Q.
Q3: My personal rentals have not, but I bought in Lawton, OK because that was my duty station. I've sold my Killeen rentals during the increase in prices, but even those probably did not beat the S&P during my hold period because they were cash flow negative and a long hold period. I didn't do a full IRR analysis at the time, but it probably didn't beat the stock bull run. That said, I bought them with VA and FHA loans so my return on assets was still pretty good.
Q4: I love Texas and am biased. But I think Texas is the future of America. Just as the 1800s were New York's century, and 1900s California's century, the 2000s are Texas's century, and it is only just beginning. I think anyone who is holding property here with a long term view and doing it smartly is more likely to be rewarded for it than not. It sounds like you've put some capex into these already. That might be necessary whether you continue renting or selling either way. But would be a shame if selling into this market were the outcome. My gut says that if you are still break even or better, you'll be glad you held in 10 years time.