I am working with a seller, and great company, who has a real financial incentive outside of the transaction to receive an inflated "vanity" multiple. Business should likely trade 3-3.5x, they need to sell at 5x. They need some cash upfront but are willing to accept my terms. What are the most aggressive terms and structures that could turn this a fair deal?

For context, I can have conventional PG'd financing on ~25% of the 5x purchase price to get the seller the cash they need.