how to make it work

[Philip Seymore]

I'm trying to Figure out how to make this potential deal work.

Seller wants to sell but not right away because they still use the house for some income.  The Mortgage is paid off. 

How can I strike a deal where they can still receive some income from the property, but I can purchase the home and make my share and eventually (1-2 years away) own the home and eventually get full profit from this 8-unit property. Thanks