Troy and Andrea have decided to make a land purchase to start a cattle operation. The married couple wants to leave everything to each other in the event of death and wants to set up the easiest business structure. The landowners, Brad, and Grace, are willing to sell the land and promise a clear, fee simple title during their ownership for $1,000 per acre if the buyers will also allow them to duck hunt (all parts of hunting are legal) on the land for 3 years. All parties are over 18, all agree, and have no competency issues.
What type of co-ownership is attached?