I pay $100-150 pesos depending if I use a local barber or get it don't in the mall.
My lass pays $200-300pesos for a wash and dry every week. When she gets colour put in it costs around $650pesos, when she gets her extensions put in, if she has to buy new ones it costs around $2,500pesos, with existing extensions and styling, costs around $1,000-$1,200pesos.
If you cut and style men and womans straight hair (as opposed to fuzz) then a mobile service would bring in better money, I reckon rent on a prime location would be high. Mind those free units in Zona Colonial might be cheap as they are all empty, or maybe they are empty coz they are so expensive who knows. Then again do women go to ZC to get hair cut?