There was a product that I had investigated recently which allowed you to invest in your own RRSP assets into a mortgage on your own property. The problem that I saw associated with it was the annual 4-6% Fee.
For you to use a $100,000 in RRSPs for your own projects you would need to pay 4-6% or $4-6,000 every year. This doesn’t include any interest that you would want to pay yourself.
I believe the product is MyMoneyMortgage through Mortgage Alliance brokers. I have included a video from youtbe that explains the product in more detail.