Help needed in analyzing a possible adult family home in Wa

[Maxwell Anyimah-mensah]

So my wife and I have been negotiating with a home owner for about 2months now and this is our final proposal that he has agreed to: Property is worth 640k with current adult family home set up or 690k when fixed up without the adult family home equipments. It's located in one of the most sort after communities in the general Seattle area. 7bedrooms 3baths 3000 sqft Adult family home ready Terms: Lease option: $675k $50k down 4K a month in rent with $500 rent credit. 4year term to exercise purchase option. Am is there something I am missing in this deal? Thanks for your contributions: