You need a few hardware things ( a brewery pot, like one to make jam or hot spiced wine), 2 buckets, 2 different filters and smaller things for temperature measuring and wort measuring. All in all if you are creative you can produce some of these things yourself so you end up around 100 dollars for the equipment i guess. Less if you are more creative
The barley is quite cheap. A friend of my family is a farmer and he grows barley for beer brewing, so he is giving me a few kilos for free. However you need to sprout it and then crack it a little bit. For the time being i bought it finished (its called Malt), but next weekend i will try to make my own malt out of the barley.
The Hops and the yeast is not expensive too. So in the end i think for 20 liters of beer you pay less than 20 dollars or so for the ressources you need.
Is it worth? I think yes! Austria was kind of a beer desert until 10 years ago, with large breweries making basically the same beer. It was fine, but the subtleties of taste that was possible, were not used. Also up until today the big companies are filtering their beer in the end, which makes it not bad but rather boring. That already changed as you get now very often Zwicklbier which means unfiltered beer. So Austria changed from beer desert to beer heaven (well almost, there is still room for improvement). If you brew it yourself, besides the fact that it is fun to make it, if you increase your practice you can make various differen beers with an excellent tast.
I recon you are well learned in technichal stuff, this is something i sadly lack. I was never the experimental type in school and never got into chemistry or physics. But chemistry i now learned a bit by brewing beer
Have a good day too, Utlo!