Your first problem is that you will need to follow whatever the laws are in Mexico for such an investment. In short I will say that the biggest obstacle will be determining your right to the property or your percentage. As i do not have specifics I would advise you to speak with a local real estate attorney who may be able to help or at least point you in the right direction.The issues are whether the property is in your name joint or his name. If in your name that will help a lot. Also look through your finances see if you can show a money trail proving it was your personal money being invested. These are the two main obstacles. Other than that it depends on the laws of the area