BRRRR Method Using Seller Financing

[Dan McCarthy]

I have a local seller with a duplex that would be willing to accept seller financing for the property. I have also located a local credit union that will do a cash out refi for up to 80% of the appraised value of the home after repairs with no seasoning period. My issue is that the seller likes the idea of deferring his capital gains over a few years and I don't know the best way to approach the scenario. Any input would be appreciated!