Positive Cash flow investment properties

[Sarp Ka]

Hello all,

i have seen few threads here mentioning it's too hard to have cash flow positive properties.

i am looking at listings on Zillow and there are bunch of $100-150k 3 bedroom properties. According to zillow rent estimate they should rent out at 1-1.3k.

Some of them are already rented out. I am wondering if I missed something here with regarding to San Antonio not having cash flow positive properties. Is there something seriously wrong with those properties?