DAV, in your example, is any part of those funds used to put on the EFP , available for trading after the 20% margin.
As an example. If there is50k of cash in an account, and all 50k was used to buy an EFP, then that account would be earning x% interest on those funds.
Since the margin is only 20%, is the remainder available for daytrading, without incurring a margin loan ?