I've been a professional programmer since age 15, now age 34 and homeless in San Francisco/Mountain View, unemployed and seeking in tech for 2 years, salary cut

I've been a professional programmer since age 15, now age 34 and homeless in San Francisco/Mountain View, unemployed and seeking in tech for 2 years, salary cuts and decreased respect and more training my replacements at each stop since 2015. Teaching "opportunities" are everywhere, but I prefer to wait tables and do independent software research in lack of a suitable paid position in software development. OKRs to reduce labor costs are an interesting concept, though. What forms of results would you be looking for? I've never worked under a productive OKR or KPI system, so the more detail in your thought process the better.