I'm disputing the fees that are removing at least 3 or even 4% a year, and that is on top of the interest. (I'm in the housing industry and I can tell you for a fact that everybody underestimate the fees until the tax increase, insurance increases and you need a new roof)
Now, your house is going up 4.63% a year. You have 3% of fees and 3% of interest a year (or 7.5% if you buy today). How is your 5:1 leverage going to help you?
You quickly realize that in order to make the math work you need your house to go up AT LEAST 5 or even 6% a year. In the current environment your house even needs to go up close to 8/9% a year to just break even.
And you are right that you use leverage so if it goes up above those numbers you start to make up equity very quickly. But there is almost no chance those type of returns will hold in the future.