How does JV and/or Seller Carry affect a 1031 exchange?

[Logan Vierstra]

So I'm talking to a owner of a couple duplexes in Carmichael California. He no longer lives in the Sacramento area and wants to sell what he has here and 1031 into properties closer to the Santa Cruz area where he currently lives. He owns them free and clear so the idea of either doing a JV or a seller carry is something that was brought up.

My question is, how does a JV partnership or a seller carry deal affect his ability to 1031 into other properties?