For me, this is essential. On priciple, I won't pay money to be a software engineer.
I never paid for cloud infrastructure out of pocket, but still became the go-to person and achieved lead architecture roles for cloud systems, because learning the FOSS/local tooling "the hard way" put me in a better position to understand what exactly my corporate employers can leverage with the big cash they pay the CSPs.
The same is shaping up in this space. Learning the nuts and bolts of wiring systems together locally with whatever Gen AI workloads it can support, and tinkering with parts of the process, is the only thing that can actually keep me interested and able to excel on this front relative to my peers who just fork out their own money to the fat cats that own billions worth of compute.
I'll continue to support efforts to keep us on the track of engineers still understanding and able to 'own' their technology from the ground up, if only at local tinkering scale
Self hosting my own LLM setup in the homelab was what really helped me learn the fundamentals of K8s. If nothing else I'm grateful for that!