What's the best place to live in the US at a budget of 3600 USD for 3 young guys?

Dev at ethOS, a mobile OS that is crypto native- nf.td/markus, Technology brother

Of the major American tech cities — SF, NY and LA — LA is probably cheapest (but might be in an out of the way neighborhood).

Slightly smaller cities like Seattle, Austin, Miami, can be good.

Depends on what you're optimizing for?

SF is most expensive, but still highest talent density. NY and LA more diverse.

Not optimizing for anything in particular, just USA. And I think 3600$ would be not enough for the cities you mentioned, wouldn't it?

I had an Airbnb just for myself in Oakland (20min walk from Bart, total 45mins to Ferrybuilding) for 70 USD a night. Not too expensive IMO