San Antonio TX - Demand for vacant city lots ? Land Realtors?

[Tricia O'Brien]

I am researching buying vacant lots in the San Antonio area through tax sales, then selling them for a profit within 12 months, probably  through a  realtor . Is there a high demand for people wanting to buy developed  lots (with water and electric) so they can build their own home or put a mobile home on it?  Small lots (6000 sq feet or less)  in established neighborhoods.  What about developers looking for lots?

Which neighborhoods are more sought after than others for this?

For example, if I had a lot with a full market value of $6K  and put it in the market for $4200 how long would it take to sell?

I live in Alaska but have been researching real estate investing in Texas because of the strong growth of jobs in TX and that TX has some of the fastest growing cities in the US