Newbie house hacker(vacancy & repair)

[Tu’ssant Rantanen]

Hello bigger pockets community my name is Tu’ssant Rantanen I am newbie 20 year old investor, I’m looking to buy a house hack in Wisconsin preferably a 4/5 bedroom duplex using fha. I have been running numbers on rent and and need a more experienced investor to give me insight on a good number for vacancy and repairs to save every month to add to the principal & interest, property tax, home insurance, and mortgage insurance. I know the market rents in the area and my mom will be moving in with me who will also pay me rent on top of other tenants in lower or upper unit, therefore seeking out accurate vacancy and repair fees to include in my numbers monthly, thank you ahead for anyone who helps!