@Joel951
If believe, in Canada, you cannot claim mortgage interest on your principal residence. Which is appears that you will be doing. I.E, remortgaging your primary residence to pay for the secondary property.
Definitely you need to talk to a legal professional, probably lawyer, tax accountant, mortgage holder, etc. Don't forget about your insurance company, local bylaws. Also, consider legal tax ramifications, i.e. sole proprietorship vs incorporation. Of course, there is also capital gains to be considered, which our Federal Government is looking at reducing the current exemption from 50% to 40%.
Good luck on your research.