"Invest in residential rental property!" they said. "It will provide a great income stream for your retirement."

We need to keep in mind that Lind was forced by law to give them free rent for two years. He was not allowed to evict them for virtually any reason AFAIK, including nonpayment. Yes, he was supportive and generous, but at some point we all reach our limits, especially when dealing with sociopaths who are bent on taking every possible advantage.