1) Read this
Overview of Dominican Real Estate Law
2) Use search facility to cover the topics you want facts on.
3) Canadians & Americans are not regarded as different animals from anyone else. A purchaser is a purchaser.
4) The legal expert on this forum Dr. Guzman would probably not claim expertise in Canadian & American 'rules' whatever those might be - tax rules?
5) Demographic differences between what & what?
6) As well as 'fact' you might want to consider interpretation of same. Particularly in the DR.