Help..Best way to negotiate the purchase of a BIG RE portfolio?

[Nathan Coldsmith]

Needing some help here from the Bigger Pockets community!

Currently in negotiations of purchasing 11 multi-family buildings and some being multi use properties.. our biggest opportunity yet!

The seller is on board with seller financing and we choose to only thoroughly look at 2 properties, run numbers, in hope of coming to an agreement on price and then using that model across the board for ALL the rest of the properties..

What I'm finding it there is ALOT at stake for both sides of the potential transaction. Alot is riding on how we both analyze these two properties! Almost too much at stake that we may not come to terms..?

Am I looking at this wrong.? What is the better approach for both parties when looking at a sizable portfolio and negotiating a return/ purchase price.?

All help is appreciated as always.

THANK YOU