How do people find affordable apartments in NYC? When average rents approach $4k per month, how do these hardworking New Yorkers, the tech intern and the junior copywriter and the public school English teacher and that Uber driver/proofreader/Amazon overnight shift warehouse worker/busboy guy find a place to live? The words “side hustle” have become of part of the lexicon of millennials and beyond, especially in expensive cities like NYC and San Francisco where people spend waaaaay more than half their…