Saving for what? What will the money be worth for the poster ? What is money worth when the temperature rises globally by 3 degrees or more C?
There are only 2 types of financial outlays: things that make money permanently disappear (holidays, electronics, bills, rent, car repairs) and things that generally increase in value (houses, index funds, desirable collector items, gold, etc.). It's worth understanding and applying this basic concept early. It does not mean never do anything fun, but keeping the long-term issues in mind is something I regret not starting earlier.
In my 20s, I had pondered buying small, cheap blocks of empty land in remote towns, and that would have been a great way to get started on a long-term investment from a young age. Instead, I procrastinated and then I suddenly freaked out when I was over 30, I have lived like a dog ever since, living ultra cheaply, cutting every corner and trying to pay off my house in the purported name of freedom.
Regarding ecological issues, having a roof over one's head is quite desirable in heatwaves and other extreme climates, or times of economic chaos. From a less selfish perspective, a lot of Australia's carbon emissions are caused by burning coal, so I'm glad to be a part of the solution by having solar panels on the house that produce far more energy than I consume, exporting most of their production back into the grid.
Back on topic, the most devastating thing that can happen to a man is to get married and then divorced, losing all possessions in the process, along with any kids. I heard that there is a dedicated forum called 'divorced dads' and there is a very high suicide rate for that demographic. Remember that a lot of women have experienced or witnessed horrible treatment by men in the past. So in addition to having the legal right to leave an ex-husband in the ruins of homelessness, they feel that they have grounds for vengeance. I don't know exactly how to prevent this, but it is something I saw happen all the time when I was working alongside older men. You have been warned.
Do not, under any circumstances, date or become further involved with a single parent whose ex is still in the picture and has partial custody of the children.
I'd be curious to learn more about why you say this. In my age 40+ group, the majority of single people seem to be in that category.