My first deal analysis, please critique (Dallas)

[Brian D.]

For my very first deal, I'm considering going turn-key through a PM.  He sent me a list of 5 and there's one I like, so I'm trying to run some #s on it to see if I have learned anything.

It's a 3/2 newly updated all around, good B neighborhood with good schools for $155,000.  Rent-o-meter shows $1300/mo.  

Prop taxes $223

Insurance $67

PM $95

Advertising $54 (half month rent/12)

Maintenance, capex & vancancy I said 8% each, so $312

Total Expenses $751

Mortgage payment $523

So cash flow before taxes of $26.50/month.  Thoughts?  Anything I'm missing?