I'll be visiting San Francisco for about 3-4 nights in a few months (and then driving down to Monterey / Carmel / Big Sur). We'll likely rent something on Airbnb, since it will be more affordable than a hotel.
There are a MILLION apartments on Airbnb, so I thought I'd narrow it down by neighborhood. Where are some areas with abundant cheap eats, besides the obvious Mission? We're definitely on a budget, and will be looking for ethnic food (Mexican, other Latin American, Japanese, Vietnamese, Korean, and all other kinds of Asian), good happy hour deals, and one or two 'splurges'.
I know this is a broad question - I've only been to San Francisco once before, almost six years ago. Thanks for any guidance at all!