Spanish schools in Costa Rica are expensive and the teachers are not really qualified Spanish teachers, so how can you teach or help people in Spanish when you are not even trained.
Schools do not want to hire Spanish professionals because in fact they would have to pay more. So what kind of service are they offering? A poor but expensive one.
I am a graduate Spanish teacher and my students do not pay for unnecessary ambitious overpayments.
Who would dare to charge a lot of money, without even having classrooms and qualified teachers? The ones that want your money and that's it.