Acquiring duplex w/ tenants

[Brian Jamieson]

I'm about to take control of a multifamily that's currently rented month to month on both sides well below market rent. Currently paying 900 and 950 and expected rent is 1700-1800, double their rent now. 

I already have to kick one out so I can live there for the mortgage, should I remove the other too and fix the little things or should I raise the rent with a signed lease? I feel like I should start fresh and vet my own tenant. Should rent fast.