Hi Michaela - I'll provide the obligatory "Whether it's somewhere in Mexico you plan to live full time, or a place to build a house for occasional long-stay vacations, hopefully it is also somewhere you've spent time and know that you like the area, the climate, the layout, infrastructure/amenities etc., for sure."

:-)

There is a message board of expats in Huatulco; currently there's a thread there called "buying land in Huatulco" that you might want to check out:

Visitors' Comments :: Huatulco :: Buying Land In Huatulco

Would be interested to hear how things go for you and what you find out, and decide!

EDIT UpDate:
See you found the Huatulco board; I hadn't noticed you had started that thread! Heh. Good luck!