Strangely my mother did this to me, too! Asked my advice relentlessly about renovations/additions to her property, which I provided mainly because she didn’t have the money for any of it and ultimately if she can’t pay for something and loses her home, whose responsibility do we think that issue will become? Yours truly! I was exhausted by it for the same reasons you are. She never listened a single time, yet kept asking. I decided to say the following with her and other similar people in my life who constantly ask advice and suck your energy up when they have no desire to listen: “that sounds like a complicated situation, but I totally trust you will figure it out.” Alternatively, something like “I think it sounds like you know what you need to do.” Even if they do not sounds like they know what they need to do. In terms of keeping my life calm, I’ve found it a) validates their feelings so they’re not defensive and obnoxious if you give advice they don’t like, and b) you literally do not have to give advice and waste your own time.

Anyway have been fully NC with my mother for two years and life is much better now lmfao.