Purchase ideas on portfolio

[Jacob Stevenson]

I'm discussing the purchase of eight properties with a retired owner. He sold a couple of his last year and one of his biggest concerns is not paying more taxes.  He also wants around 180 k to pay off existing debt and be debt free.  

My goal is to get all the properties under contract, I have enough money to do 20% on the portfolio but would prefer to not use all my cash.  

Any suggestions on ways I can structure the deal to limit his tax burden, get him the cash he needs, and preserve what I can to find more properties.  

thank you