Beach property in Mexico
is never yours .You can only "own" it through a (bank) trust. I would assume that the purges Zeehag mentioned were caused by the peso crisis and the banktruptcy of major banks. Your purchase
at best will be more like a lease
Ejido land : A lot on the coast, probably the few unspoilt pieces remaining but run...! I looked into buying in Yucatan
,imagine acres of jungle with a "private" cenote , but I had to let it go.The laws surrounding it are unfathomable.I can read legalese in Spanish but one does not even know where to look and if you do find something it usually comes in 2 ,one saying you can, the other saying only if the moon is permanently full . Mexicans usually don't bother. In addition laws change from state to state . The properties range from lands that have not been touched since the revolution to lands where there is a co op in power and they make the rules ...Stay away...
The rest of property ownership
is pretty ok, but not like in the US as most laws are based on French law rather than British common law. Eg I am pretty sure mineral rights are never yours,stuff like that
I am currently selling a house in the central highlands -Mexico city- and the first thing people ask for is papers from a notary .