The loss of the entire SBD limit would cost an Ontario CCPC about $65,000 in additional annual corporate taxes ($500,000 x 13% increase in the corporate tax rate). However, once income is paid out by way of dividends from the CCPC, the analysis we have reviewed suggests that the combined personal and corporate tax burden will increase by only about 1% as compared to the current tax regime.
I have only dabbled in drop-shipping before when I had an eCommerce platform 6 years ago or so. I think it is something that you could do on the side, but you would want to do in depth research on the industry you want to get into before setting up shop. It may be a little less passive up front, but over time you could take your hands off the wheel.