Upon his return to the Loxahatchee, Nelson discovered that his wife had a new lover. He divorced his wife, and after that Nelson bought cars for the women he wooed, paying for them in installments to ensure they would stay for at least a while. Focusing again on his zoo, he found that property values were skyrocketing. Nelson got a subscription to the
Wall Street Journal and added more and more land to his sprawling camp. Shortly after he began his forays into
real estate, a health inspector declared his zoo unhygienic and demanded he install
lavatories. Nelson did, but the Health Department found them "unsatisfactory", and in 1960 he was forced to close his zoo. With no income, the taxes on the land became too much for him, and he ended up borrowing
$100,000 ($ in today's dollars) to pay them. Nelson already had a deep-seated mistrust of the government, and the closing of his zoo was, to him, enough to confirm his paranoia. He became more and more closed off. He began to dam the river leading to his camp to keep boats away, and installed fences and padlocks to discourage land travelers. He put up signs around his land reading "Danger: Land Mines". As added discouragement, he kept a
12-gauge shotgun with him at all times. Nelson began to develop severe stomach pains, but refused to see a doctor. He distrusted them because his brother-in-law, Philp Celmer I had died during pacemaker surgery. It was speculated among friends that the pains were from cancer, but they could have been an
acid condition. Nelson was ill, and had to urinate using a catheter. His grand niece, Cynthia Celmer Tomassetti, who saw him weeks before his death, remembers him in poor health; says Celmer Tomassetti, "He told me he had let all of the zoo animals go because was afraid he would become too ill to care for them, and they might starve to death". By the 1960s Nelson had become so reclusive that he would not let even trusted friends visit him without first sending a postcard to ask his permission. He ventured into town once a week to check his mail at the post office, and would sometimes buy steaks, but for the most part he remained holed up in his cabin. Years later, his nephew recalled his uncle's change in personality: "During the last 10 years, his eyes seemed to lose their sparkle. He became a lonely man, and a rather sick one". ==Death==