Comment by geoka9

Not in North America. Not sure about Mexico, but in the US and Canada the majority of tennis courts are public and free (some of them are being converted to pickle ball, but that's a rant for another post). You can pick up a racquet at a thrift store for a few bucks. A can of balls (a few bucks more) can be used for a long time, especially if you're a beginner to intermediate. If you become more advanced, the biggest expense can be shoes and strings, but that depends on your form/play style.

I find tennis an incredibly cheap sport to do recreationally. Basketball can be cheap, too, but I think you'd go through shoes pretty fast, especially on a city hard court. Soccer maybe cheaper, but it's too much organization (hard to get 10+ people on the same page at the same time).