Opinions from cash investors

I'm looking to get into investing and have 120k roughly to begin with, located in Dallas and have visited the foreclosure auction at the courthouse but was a little disappointed as I did a bunch of homework and none of the houses I was interested in showed up. What would you do if you had a chance to start over, multi family duplex, single family home, commercial shop, etc? Also for the people who bought several cheaper homes (50k and under) do you not worry about them being in bad areas and having bad tenants? Any advice and success and failure stories are appreciated