Whether it's new construction or an existing property, 100% financing of a rental purchase is essentially unreasonable. You're borrowing money that you're paying mortgage interest on and making payments on for the down payment, and then you're also getting a mortgage on the property itself. It's 100% financing.
In the United States, they've effectively banned this practice. You can't do it in the United States. It's not acceptable in their banking laws, both federally and by state. It really makes no sense that we would allow it to happen in Canada, and there are very easy mechanisms to stop it from happening.