Sorry, but my knowledge of sexoservados is mostly limited to Tijuana.  However, discussions I've had with those who have hobbied throughout Mexico is that local talent is a YMMV deal.  (Which isn't what I want because I'm into the sure thing GFE that Tijuana top tier agencies provide.)

Some of the Tijuana escort agencies have rates for long term dates.  I believe cumintj even has a resort rate.

You might consider taking a chica with you on your trip.  I've done that with civilian Mexicanas and had some very delightful experiences.

Buena suerte!