I highly recommend that you rent for 6 mos. to a year & get your bearings. Also because both of your work locations aren't near middle schools (or high schools) that are often recommended here.
Here's a map I've found useful that illustrates this.
Texas School Performance Maps
Given both of your work locations, I'd look in the Kyle/Buda area or possibly even San Marcos or even Lockhart to rent...& possibly buy (Lockhart isn't often mentioned here, but you can get alot of home for the $$). Others here might also recommend Circle C area or even Wimberly....but that sure seems like a big commute for one or both of you.
Are you more interested in urban, suburban or neat little "mayberry" type experience?
(don't know about SM Baptist Academy.)