Student Housing Expenses

[Nicolas Jefferson]

Hello BP, thanks for taking the time to read and help me out!

I'm looking at several student houses in my area (currently a Master's student myself, so trying to multi-task getting my M.A. and real estate investing) and I've already calculated the monthly expenses/costs for the houses around here. However, I feel like there would be more miscellaneous expenses for student houses than normal family houses that I didn't account for. 

What expenses do you account for when calculating rent for student rentals? Currently the only expenses I counted for were (not including principal & interest):

Property Taxes - Varies by House

Insurance - Varies by House

Vacancy - 10%

Repairs - 10%

Property Management - 10%

Would you increase repairs? I know the current property management company requires a down payment of a month's rent before signing the lease. Also, the houses range in the $60,000 - $100,000 range; so not the most expensive houses.

Thank you!