Home brewing can be done very cheaply or very expensively, depending on the ingredients and equipment used. It can be a long, deep rabbit hole (and a fun one!).
By the time I stopped, I had a very modest setup of a primary fermenter, a secondary fermenter, a bottling bucket, and associated bits and pieces, like a long spoon, a siphon,capper, a device for determining the alcohol content, bottles (so many bottles), airlock, and the cooking bits: stock pot, muslin for the grains, that sort of thing.
I probably spent a couple hundred bucks over time to get that stuff, but there's so much more you can buy if you're the obsessive type, like wort chillers and setting up to keg the beer instead of bottling it, it can get crazy expensive.
My nephew wanted to try his hand at it (he goes from one thing to the next with no discipline), and asked me for help/advice, and before a week was up, and after I specifically told him not to spend a lot of money, he dropped several hundred dollars on a "super-deluxe" kit, money he didn't have, and he brewed exactly one time.