Please change the word cheap / cheaper ... to more affortable 👍 some culture, they think if ppl comment their place things service is "cheap" , they feel offended , dont ask me why 🙈
I suggest you to interview university students in local universities. You can also show how the local famous universities look like. The students have more time and eager to practice their English. On the street, people are normally rush to work.
In the S F Bay Area, US, Haircut for a woman median length is US $60.00 plus tax 10% and Tips15%. total of $75.00.00 My friend has curling hair median under ear length and went to have her hair straightened for $400.00 not including tax and tips (15% $60.00/tips, Tax $40.00) Total $500,000.00. In the Bay Area, SF, Ca. restaurant now are 15% - 20% or you will get a dirty look from the servers.