when I see that smth goes wrong with my haircut. Usually it is once a 2 month. Price is totally depends on a place. There are some cheap ones for 4 $ and some for more than 7. I usually spend about 7 or 8
My mom cuts my hair 2 times a month (she used to work as a hairstylist while studying) I'm 20+ but she loves cutting my hair, and I get to spend some time with her. It's also free so I save quite a bit of money.