It's important to remember the trade-off between cost of living and network value. SF has a really high density of founders, talent, and investors but a proportionally higher cost of living.

Another important consideration is where your users/clients are. How would moving affect your execution? E.g. the Airbnb guys spent most of their time in NYC during the YC program because that's where their early users were.

If I were you, I'd focus more on ramping up growth.