Of course, it would be easier to buy Chia for $20 than to mine it yourself. But the problem is that no one sells for $20. According to https://coinmarketcap.com/ru/currencies/chia-network/markets/ right now, anyone can buy this coin using a centralized exchange at a price of $750. Although everything is possible in the cryptocurrency market, so you should wait for the Chia dump to $ 20.