Hi Lorene,
What area of Mexico is this property? You can get a good summary of buying real estate in Mexico here: http://www.mexonline.com/propmex.htm
It looks like the laws will be changing in term of needing a 'fideicomiso' or bank trusts to own land in the restricted zone, along the border and coastlines. However, even when/if it does change, and you can buy property without a fideicomiso, it won't apply to commercial property, and this includes vacation rentals.
We bought a vacation home north of Puerto Vallarta 4 years ago and have done well with revenue. We also purchased land with the idea of building a couple of homes, and that didn't go well. Long story but this was just when the economy tanked - so the project went sideways. In short, if anything goes wrong with a development project, you're in another country - with it's own system, laws etc.
It's a buyers market in our area right now - lots and lots of inventory. The market is just starting to pick up....slowly. I have a good friend who's a broker there, let me know if you need a professional opinion on this development, private message me.
All best, Penny