Just ensure the cost data sources are very clearly documented.

That being said, all of these lead-generating companies do the same thing and often use the same data to source contact information.

I am always looking for good sources of information, which I might share with our friends who are reading.

Also the ability to repay -  your source of income. 

If you're still not having luck sourcing a wholesaler, your next best bet is to network and connect with an investor-focused real estate agent.

And usually you have to be self sourcing them or doing some serious turnover. 

For most, this isn't a realistic option so they update some of the most important regions themselves and copy the data from other providers where they don't have coverage.This is a big problem with these big consumer-grade real estate analytics platforms—you don't really know the source of that data, its frequency, etc.

Are there any tips you might have on sourcing great deals, deal structure, and how to know whether LTR, MTR, or STR is the best route to take?

As a foreign buyer, you are to look for 2 things in particular: the temporary foreign ban (which they keep pushing further back) and the source - The foreign purchase ban which applies across the board. yes there are exceptions but if you are not a Canadian tax Resident (which it seems you are), you will need to look for communities where the population is less than 100,000 in general. - Another exception to note on that foreign buyer ban is the number of units/doors for your investment: I believe the magic number is 5+ as this would be considered as commercial Real Estate- In Ontario, you will also have to look our for the Non-Resident Speculation Tax (NRST) which imposes about 25% on the purchase tax.

And if this is illegal in some states...what exactly is illegal about finding interested investors and matching them up with a funding source?