One thing to consider carefully when buying across the border is how you will structure the deal. Please be very careful here. I`m not an expert so don`t quote me but, as I understand it, the US has estate laws and if you own your property in a personal name and pass away, your entire estate (including Canadian assets) could come into view of the IRS for estate tax which is paid on the entire value, not gains. As I said, I am not an expert, I am just suggesting to find out from someone who is before investing. Good luck.
Harry