First time analyzing a deal. [Requesting feedback]

[Nigel Boles]

Hello again BP members.

My name is Nigel and I'm super new to Real estate. So please be gentle.

I believe I found a nice deal on a rental house in HOUSTON,TX. I was crunching the numbers following Brandon Turner's "Four Square" method found here and would appreciate it if someone could go over my report on this one house. I really do feel like i'm missing something important and i'd like to know where i stand on this very new concept of real estate before continuing and purchasing the house.

Cash flow

• House listing price : $135,000
• Rent price : $1300
• Cash flow : $301.34
• Annual Cash Flow : $3616.08

Additional fee's

• Taxes : $2336 -$194.66/m
• Insurance : Estimate of $200/m
• Property Management: Quote of $90 per house 
• Lawn/Electric/Utilities - Tenant paid
• Rehab : $0 No rehab
• Mortgage: $514
• Total monthly expenses : $998.66

Cash On Cash Return Investment 

• Down payment : $27,000
• Closing Cost : $3000
• Rehab : $0
• Total Investment : $30,000
• COC ROI : 12%

So here is what I've came up with. I'd like to think this is a good deal and a good start to a newbie. So if any of you could look over these numbers and correct me where I am wrong I'd really appreciate your help! Again, I'm still new to this and very scared of starting off on the wrong foot. 

Thank you!

-Nigel.