Seller doesn't want to provide schedule E for 8 unit building,

[Nazz Wang]

Hi BP community, I am negotiating a purchase for a 8 unit building, 2 stores and 6 apartments, and the seller does not want to provide schedule E for 2 years for the building. They had agreed to provide all leases and vendor contracts, and estoppel letters. What are the possible reasons for this, and what are the possible negative outcomes of me just doing my underwriting very very conservatively?