$0 should be $100 because you're probably going to use some cloud service and AI
At the low end I would start building a small AI app - likely in the chat or forum space. Start as an OSS vendor that has a free deployable or paid options
At $10k really isn't much different because 10k is not paying for anything significant. But I would either add agentic features (since it uses a fuck-ton more tokens) for my chat/forum- OR - I would hire an intern at a non-zero biweekly rate (maybe $1k per month) for at least 4 hours per day.
At $100k I would start a construction company if I can attract a GC and build ADUs for people for $500k each in the Bay Area. Probably have the GC and one other person and myself doing the actual buildings and split it 3 ways evenly (as long as everyone's doing the same amount) and make about 3 ADUs per year.