Right, so you have to get more creative on the purchase, focus on getting good deals, and have multiple back up strategies for renting. 

Successfully turned 80% of rent roll from $650 rents to $1150 and drastically improved the NOI.

I'd say they can leave early and as soon as you get the place rented, you will return what is left of the rent. 

I Have Real Estate Rookie (90 days to your 1st investment) by Ashley Kehr Also Buy, Rehab, Rent, Refinance, Repeat By David Green, And A Ton Of Podcasts.

Rental (mostly DSCR) is a different story as you need to have the rent support/cover the PITI + HOA costs.

mortgage closing costs: 2 to 5%property value appreciation: 3 to 6%cash on cash return: 2 to 4%cap rate: 4 to 5%rent growth: 3 to 5%rental property expenses growth: 2 to 4%repairs & maintenance cost: 5 to 10%capex: 1 to 3 %Vacancy rate: 4 to 6%Mahalo !

She needs to pay the rent. 

:Class A Properties:Cashflow vs Appreciation: Typically, 3-5 years for positive cashflow, but you get highest relative rent & value appreciation.Vacancy Est: Historically 10%, 5% the more recent norm.Tenant Pool: Majority will have FICO scores of 680+, zero evictions in last 7 years.Class B Properties:Cashflow vs Appreciation: Typically, decent amount of relative rent & value appreciation.Vacancy Est: Historically 10%, 5% should be applied only if proper research done to support.Tenant Pool: Majority will have FICO scores of 620-680, some blemishes, but should have no evictions in last 5 yearsClass C Properties:Cashflow vs Appreciation: Typically, high cashflow and at the lower end of relative rent & value appreciation.

Real Situation, no not real names.Things happen, friendship is over for whatever reason.They were doing a house hack while renting out the other rooms to tenants. 

Are you planning to live in one unit and rent out the others or make them all rentals?