Land investing

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I have a family member who bought a piece of land for $10,000 about 1.5 acres in a heavily secluded area , but close to the beach. Since you currently cannot rent the investment it is not cash flowing. A argument that the buyer gives me is that since it is payed off and they pay such a low amount in taxes it is not hurting them. To me this still makes no sense, but what I currently am asking is what is the enticement for many when it comes to investing in land.