My wife got me a kegerator a couple years ago. It’s amazing! Like $700. Fill up the keg with tap water when you run out (my keg is like 10 gal), refill the CO2 tank every 100 gals or so. I did a math a while back and it’s like 6 cents per glass, not including upfront costs.
Or you can get an adapter to use with a standard CO2 tank with a soda stream machine. Refill those CO2 tanks at your local home brewing supply store, which again is way cheaper than the sodastream CO2
Similar story, when I was 12 I was late for the school bus and ran about 2 blocks with a full backpack and a snare drum. Ended up puking in the bus aisle about halfway through the hour long ride. Basically the same thing.