Anything Missing in Cashflow Calculation?

[Yan Huang]

I've only purchased a single family home before; and that was rented to family. I sold it and I am looking at putting some of those funds towards a cash flow property. I am looking at North Las Vegas duplexes at around $130,000; and assuming I can rent out each unit for $600 per month each, I am trying to figure out if I have any errors in my projections (used the BP Excel to calculate cashflow):

https://drive.google.com/open?id=1_8_zDIWrz1uRvE2G...

I based the other numbers at what seems to be average North Las Vegas zip code at that price.

Thanks in advance!