Using Master Lease or Other Options to Close Deal, Thoughts?

[Ayodeji Kuponiyi]

Good day BP Nation, I'm hoping the great people hear can help me seal the deal at a property I'm getting under contract. 

Asking price: $1,135,900 

26 unit (22 unit apartment and a 4 unit next to it) 

8% Cap Rate

My offer is $980K.

I wanted to try the master lease option or seller finance. I currently filled out a contract to purchase and would like to hear from the community regarding how to structure master lease or seller finance if seller counters my offer or stuck on their price. 

Thank you in advance