Need advice on terminating a lease on duplex

[Thomas Lowe]

I’m looking at a duplex in Michigan. Current rents are significantly under market. One side is updated with recent renovations. The other side is very crummy and currently rented month to month. How difficult is it to terminate a lease and get the current tenants out? My worry is that this will turn into an eviction type scenario. The tenants have been there for 14 years. I would like renovate this side and increase rents.

I also plan on consulting a real estate attorney but wanted to start here first.

Thank you in advance for your advice.