Dear Liz: My sister and her husband are in their 80s. They are not in the greatest health but still able to live on their own. They’ve had some bad luck financially in the past. Last year they decided to convert part of their property to serve as a short-term rental. I questioned the advisability and legality of this. I was told they had checked and it was all right legally. They proceeded, but it wasn’t legal and their homeowners association shut them down. They have now decided to rent the space month-to-month through a property management firm as the HOA will allow rentals of one month or longer.

I shared my experience with rental property, which has been very mixed. Busybody that I am, I also provided information from a friend whose family had invested in rental property. My brother-in-law insists that he had a good experience many years ago with rentals. Am I wrong to call this a bad idea? Should old people try to recoup the money they put into their ill-advised initial rental attempt with another ill-advised rental attempt?

Answer: The answer to both questions is most likely, “It’s none of your business.”

You didn’t indicate anywhere in your letter that your sister or brother-in-law had sought your opinion. You also didn’t mention any signs that they may suffer from diminished capacity or any other cognitive problem that would require intervention.

What you did do was call yourself a busybody. You might want to reflect on what causes you to repeatedly offer advice to people who aren’t interested in hearing it. Those of us who are “good with money” often feel justified in lecturing those who aren’t, or who have had (as you put it) bad luck financially. Our advice is seldom welcomed, though, and can be more about making ourselves feel superior than really helping someone else. Giving unsolicited advice is actually a terrible habit, and a hard one to break since it’s so deliciously enjoyable (although not for the recipient, obviously).

If we want our opinions to truly matter, we should be more sparing with them. We can start by proffering advice only when it’s specifically requested. When we’re tempted to make an exception to this rule, we should do so only after careful thought and preferably after consulting with a friend who already is in the habit of keeping her opinions to herself. We’ll likely discover what she’s already learned, which is that our meddling usually isn’t appreciated.