I need help crafting a deal

[Edna White]

Good day!  I need suggestions on crafting a sub 2 deal.  

How can I negotiate to buy a house that didn't sell at $749k on the open market, subject to the existing mortgage with cash over, seller pay the broker fee and i buy "as is, where is"?

it was listed last year, I viewed only from outside as the seller had hostile tenants.  Exterior accents are new windows, roof, and determined from sellers age and latest repairs it needs $150,000 of work.  Seller is being in mortgage and houses in that area at $450k estimate.  It is a multifamily.  

[Jaren Woeppel]

Good morning, @Edna White

It looks like you have already found a potential deal and identified a potential tactic (subject to) to make the deal work, well done so far!

What exactly are you wanting advice on putting together because I can tell you’ve already thought through it a bunch? A few helpful clarifying questions, hopefully help get your wheels turning as well, would be:

What are you planning on doing with the property and what is your exit plan? A lot of what goes into your offer will depend on what you want to do with the property. 

It seems as if there will be some upgrading of the units, are you anticipating a sale or refinancing out of the subject to different mortgage afterwards or is that the long term debt instrument you want to keep?