disc golf. There is a small cost to entry, but you can buy some used discs for a basic starter pack to get going. From there just find a local course and start playing! However if you enjoy it (like I did) I cannot guarantee that it will stay a cheap hobby.

That kind of thing has been happening since the 90s.

No no, getting married was the poor financial decision. After that, paying for the divorce to be rid of her was an investment in your sanity and happiness.