[throw1234651234]

Well, my previous trolling aside, you can build an internal combustion (or electric!) go-kart type deal on a mid software developer budget. There are plenty of university students doing so for under a couple of thousand USD. You can also experiment with RC planes.

I do realize how relative money is - it's "nothing" to a FAANG dev (though they probably don't have the time), it's potentially years of savings for someone working in the the 2nd / 3rd world.

[Bjartr]

For sure! My current personal enrichment hobby of choice is machining metal. Tons to learn and great fun, but an engineer's salary definitely helps as you say.