Assuming you are talking about private companies....
I think you should find another advisor, if he is willing to put more than 20% into such a product.
Ask yourself where mortgage interest rates are heading. They are based on 10-yr treasury yields. Where are those heading? What happens to the value of a fixed income security when interest rates change?
Ask yourself whether Cdn default rates are rising or falling. Remember what happened to a huge outfit in Alberta/bc about 20 years ago because of super-simple fraud. What province are their propertiesin? What is the economy of those provinces?