One of the difficulties potential renters can run into, especially ones from out of town, is that no matter how nice the neighborhood is from a residential standpoint, it might be much less nice from a commuting standpoint (be it work or the coding bootcamp).
Whenever I try it, I find public transit within SF to be remarkably time-consuming, even to travel short distances. That means living outside the city can be both cheaper and result in a shorter (time, not distance) commute, which might seem counter-intuitive.