@Brian Cowan
Actually, multi-families in general have been trending upwards for some time in Killeen / Fort Hood.
I wrote a blog post just the other week on my favorite fourplex neighborhood which is currently "sold out", so to speak.
Multi-families in Killeen were hit hard by the 2008 crash because, even though SFH and Texas in general survived with only modest drops in home values, a lot of the multi-families were owned by out-of-state investors from FL, CA and NY. Those investors liquidated in a fire sale, and Killeen multi-family values were cut in half.
They bottomed in 2010 and have been steadily reviving ever since.
At the moment, development on the SW side of town (ZIP 76549) seems to be especially trending - with a lot of buyer in rental interest alike. That is where the new Wal Mart and Texas A&M campus are, so it makes sense. A $1.8M collection of 9 duplexes (so about $100,000/unit) just went under contract recently on that side of town.
Austin investors are also getting priced out of their market and looking to their affordable northerly neighbor for buy-and-hold deals.
I think it is a good time to be investing Killeen (I certainly hope so, as I have my own fourplex in 76549!)