I will use comp tools to appraise property value without the ADU to determine cost added by ADU.  

Focus on one or two target markets, get familiar with the numbers, and use tools like BP calculators to analyze potential properties.Whether you start now or after graduation depends on your bandwidth, just have the right systems and support in place first.

Are there any tools, websites, or resources you’d recommend specifically for real estate investors in Ontario?

We've run about a 20% vacancy rate. 2 of our MTRs have been great, the third we sold after it wasn't generating enough inquiries over two years of effort.

Their REITs were initially sold to the investing public at $10.00 per share.  

So you sacrificed your own success because of something completely unrelated to the tool that would make you more successful and faster. 

Still may be competition and multiple investors but certainly a good tool to have in the toolbelt.

Yet the sale to sold ratio is 1:1. 

Like I brokered a 22  lot development of duplex's for a builder and just charged him 30k flat fee per sale.. they sold for 225k each back in 05 when I did this and I sold them all in one weekend at a big event i paid for in San Jose CA.. all to CA investors it was my fly and buy program I did in those days..

Try some local small banks or look in the tools on BP