IF you do any sort of business with SB Realty or * Realty be very careful and NEVER sign a power of attorney for anything.
Remember the Mexican government does not protect foreigner's investments. Do not buy here if you value your views.
Do not go to San Carlos the week after spring break. I imagine not going during spring break would be even better advice. It was 100 degrees and the previous week a small town had been invaded by 100,000 kids with not much place to go to the bathroom or put their beer bottles. It wasn't pretty trust me.