What payments am I expected to make to purchase a property being sold by Private Treaty, if I am the successful bidder?

Type of financing Requirement
Loan from NHT 5% of the bid sum is payable as a deposit, providing the other associated costs can be covered by the mortgage loan.
Loan from other source(s) 15% of the bid sum is payable as a deposit, providing the other associated costs can be covered by the mortgage loan.
Cash purchase 15% of the bid sum is payable as a deposit. Evidence of the balance of the purchase price and the other associated costs must also be provided before offer is considered acceptable.
Joint Finance Mortgage Programme (JFMP) 15% of the bid sum is payable as a deposit, providing the other associated costs can be covered by the mortgage loan.