Wanting to save money is pretty much the best excuse to get out of doing those things that you know you should do but don't want to — like getting vitamins, signing up for a gym, and ordering from that health food place you saw on Seamless, for example. In a world where avocado prices are rising, boutique workout classes are upwards of $30, and even workout clothes are creeping into splurge territory, it's easy to wonder: Do I have to be a billionaire to be healthy? Thankfully, no.