The answer depends on how you want to live. Renting an upscale apartment or condo currently costs around $1500/month and up. What are you investing in? If you are buying stocks, then you are not an investor; you're a speculator. If you've got $45K to invest, with the approval and assistance of your parents, you could put a down payment on a rental property and if you've selected well, your tenants will pay down the mortgage for you and build equity. By the time you are ready to move out on your own, you will have earned enough equity to sell and buy the "comfortable" place you want to live in in downtown Toronto, which will likely be a condo.If you're pulling in $45K at age 9, you should set your sights much higher for when you are in your mid-30's.