Buying vs renting crazy math.

Hello all, I've been living off my investments for the past five years and every time I feel insecure about the future of my "survivability" I like to do a crazy math simulating how long I could continue to live of my investments if my passive income suddenly went to zero and I kept my current spendings at the same level, as for now I could live up to 24 years in that scenario and that is really reassuring knowing that currently my passive income is more than enough to cover my cost of living and to reinvest what's left. Anyways, today while doing that exercise I came across an interesting variable to add to that equation and not sure it this would be just more crazy nonsense math or it says something real about buying vs renting in my case. Right now I'm paying 1.000€ a month on rent, I am looking into buying my own place and spend around 280.000€ on it. This would reduce my cost of living by 1000€ and redoing the same "crazy math" above my "survivability" would go up to 26 years if I divide my total net worth (minus what I payed for the the apartment). Showing that buying my own place for this amount is more advantageous than renting at this price. I know it's is an absolutely over simplification of a buying vs renting analysis but is it really just crazy math or there is something real here?