Paul - Bluebonnet CoOp is the powercompany in the area. $2 a foot and $250 a pole with a 30 foot easment - no underground that I am aware of (man I wish). If you build out here, heating will most likely be propane so you will not have outrageous draw in the winter. Summer is a different story, however - don't have to define Africa Hot to you since you are from Houston.
Since you have increased your search area for land, you now have at lease 4 different kinds of dirt in the listed counties. Do your homework first...