Hi Cyntia,
You have very good concerns on buying a 1/2 of a Duplex. Here's my feedback:
1. Yes you do have shared maintenance responsibilities such as roof, foundation, trees, pavements etc..so it's best that you get in touch with the other owner. Get their information so that you can contact them in the future. Keep in mind you will need to have good rapport with them to get some level of cooperation for anything that comes up in the future. It's doable though.
2. As soon as you close, you should receive a copy of the lease, information on the tenants qualifications and a transfer of their security deposit. You can't just raise their rent immediately. The good news is that the lease is month 2 month. So once you own it, you can negotiate a new longer term lease with the tenants. But here's what you might consider. A $50.00 per month rent increase could rock the boat. Since they are month to month right now, they could give you a 30 day notice and move out if they can't afford that much more per month. Then you are going to be stuck with a vacancy right off the bat. You might consider sitting down and talking with them about their plans to stay. Here's what I have done to accomplish this: I say that we are going to set up a new lease agreement for a one year term. They can stay month to month, but you will have to structure a new lease that is month to month with your new rent rate. I make the month to month rent rate higher than the 1 year term. This helps to sway them to sign a longer term lease. You could offer 2 years or more also. Its all in the negotiation. But you will need to create a new lease agreement that is between you and them if you want to change anything about the existing lease. Otherwise, the existing lease stays in play until you create a new one.
You might double check with your Title Company on this. But this has been my own experience. I always create a new lease when I inherit new tenants as soon as the existing one expires.
Call me if you'd like to discuss further.
Stacie Meeker
214-704-8617