Property Analysis: Expenses

[Jonah L.]

Hoping to get some input on the expense numbers I'm using in my model for Columbus, OH. I'm wanting to be conservative, but not unrealistic. I'm assuming 8% property management (plan on using a PM but haven't sourced pricing), 8% repairs & maintenance, 8% cap ex, and 5% vacancy. 

Also, would appreciate if someone could help me understand the best way to project property taxes. From my initial understanding it is not as easy as plugging in the current owner's last property tax. 

Thank you!