RV is right - construction loans are very hard to come by in Mexico without a lot of local established credit and/or collateral. If your budget is tight I would suggest looking to areas where the land and cost of labor is cheaper. Size down your dream villa to a more reasonable casita, be your own general contractor, work alongside your workers and allow your budget to determine the construction progress. You can build a small, simple home in Mexico for very little money if you look outside the more expensive areas, are creative and willing to think outside of the box.
You can add on the maids chambers, upgrade to granite counter tops and marble floors later on in the future...
