When cost of living is a factor, I recommend Warsaw, Poland. For me it is a sweet spot for a big enough city (collaboration, flights, etc) but neither too overw

When cost of living is a factor, I recommend Warsaw, Poland. For me it is a sweet spot for a big enough city (collaboration, flights, etc) but neither too overwhelming (as London or New York) nor too expensive (as them or Bay Area). 5x lower rent prices than in SF (https://www.numbeo.com/cost-of-living/compare_cities.jsp?country1=United+States&country2=Poland&city1=San+Francisco%2C+CA&city2=Warsaw https://www.numbeo.com/cost-of-living/compare_cities.jsp?cou...). Thanks to that I an spend most of my time on side projects. It wouldn't be possible in Bay Area.