In 2016, just to sit at the table in SaaS, you need to be doing content marketing, customer success, conversion optimization, sales, email marketing, and more. As Venture capitalist Christoph Janz says, "You have to do all of this, and you have to do it excellently."
Conventional wisdom says that you'll need to raise $1M+ to hire the best and brightest at every position just to get started in SaaS. So while it's easier than ever to start a SaaS company as a solo entrepreneur, it's also harder than ever because the level of competition has gone way up.
That's what makes it so inspiring to see SaaS businesses that are thriving and profitable—that are run by just one person. This Hacker News thread gives examples of one-person SaaS businesses that net from over $150K in revenue to $1M yearly.