The variable you have largest impact on is your cost of living. If you try to live somewhat non-conventionally (which is not hard, given that most software engineers are essentially mindless consumers), you can live on a fraction of what you thought was possible.

The financial surpul will allow you to save, and eventally to buy free time with that savings. Once the free time is acquired, you can try to do something meaningful with tech. This will lead to either the meaning you're lacking or, a discovery that tech is not that meaningful to you, which might lead to other priorities.