Seems like an investment into building expertise, which is likely to have high ROI in the future, rather than a wasteful cost.

I mean, it's a (secondhand) computer I bought for other tasks (processing very large photos, compiling large apps quickly). It's running all the time. It can also run LLMs when I want to.

The rest of my life is ultra-frugal so I am relaxed about this.

People pay thousands for model trains, everyone needs a hobby.