Here's how you migh do this:
Tell him that you will give him, say, $5,000 dollars right now in exchange for the title to his house. You will allow him to remain in his house until his death, (which he knows will NEVER come) but upon his death the house becomes yours.
You wait... He eventually dies. You put his former, but now YOUR house on the market for its fair value and use the proceeds to provide other JWs with similar "windfall mad money profits." You never explain to any JW exactly how this plan works.
Sure a real reverse mortgage might be a wiser course for him, but we're looking out for YOU now, right? (Just like the banks that look out for themselves.)
Does this sound perhaps"unethical"? By what standard?
No, it is almost exactly what the WATCHTOWER does when it takes estates from the heirs of elderly witnesses, except that the WATCHTOWER doesn't give the ld fools $5,000 mad money to enjoy in their dotage!