Demo and rebuild in Austin, Tx

[Taylor J.]

I recently bought my first investment property in east Austin.  Original house was already demo'd by the seller.  I plan on putting 2 houses on the property, the first I plan to sell and the second I plan on renting out (property is zoned for this).  Sq ft is 1700 on the first house and 1100 on the second house.  Plans are drawn up and I have gotten my builder to give me a bid.  Next I will submit the plans to the city for approval. 

Any advice or things I should know for a first timer?  Best places to pick out flooring, fixtures, appliances, etc at the best prices?  Any advice is appreciated!