Purchasing portfolio without owner financing

[Dan Minor]

Any ideas on financing a portfolio of 20 separate properties in a trust. They are a mix of single family, manufactured and mobile homes. Owner is not interested in seller financing as they are older and don't want heirs to have to deal with receiving payments, although if there was a compelling advantages for them I might be able to convince them to go that route, but I'm not optimistic. So I'm looking for financing alternatives and ways to structure a purchase. Thanks for your ideas!