Buying tax-delinquent or property or a diseased person with financing

[John Smith]

Hi BP community, 

I have two leads, one for a tax-delinquent property and the other one for a house of a diseased person. 

The problem is that I can't offer full cash for the purchase price and have to use financing. 

To me, it seems like the only "comfort" I can provide to the owners in such cases is facilitating things with a cash offer.

How would one approach this with financing? Is it even possible?

Thank you,