Texas- Houston- Average Landlord Insurance

[Mak K.]

So, I am calculating my ROI for a rental I am considering. The house is 180k, 3 Bed, 1700SF and not in flood zone. Rentals in the area goes in range of $1500-1750/mo. Taxes are $3500-$3800

For calculation purpose I am using vacancy of 10% and Maintenance cost of 5%.  

How much should I allocate for landlord insurance? I need a average plugin for Houston,TX area?