Inherited tenant who lives in the unit for more than 20 yrs

[Oliver Santiago]

Hello everyone, I am currently negotiating on buying a 2 unit property in my area. When I looked at both units, I asked the tenants in one of the unit on how long have they’ve been living there. They told me that they were there for 20plus years. I am asking this group for guidance because I do not know how to ask them to move out so that I can update the unit and rent it at market rate. The tenants are a couple who is in there 70’s and have no intention of moving out. Their rent is well below market rate. Please advise