The minimum down payment on an investment purchase is 20% of the agreed upon price. Banking regulations as well as CRA tax regulations are quite different from residential purchases ~ always check with your Banker and Lawyer; and of course, your Manor agent.
The down payment is not the only out of pocket expense you need to consider though. Things like legal fees, taxes, land transfers, a home inspection, title insurance and deposits will all catch you by surprise if you don't think about them now. Again, use Manor's Profile Builder tool to record your best estimates for what these fees may run.