Once you have that foundation, you can start leveraging the equity in your existing properties or look at financing options to expand.

What would be the % or $ figure on a Subject To take over on existing loan on tenanted rental property ?

This option does not exist in the stock market. 

A US/Canada tax treaty might exist that will prevent "double taxation".If you're unable to find someone here or at all let me know I can reach out to a few colleagues that might have a recommendation.

It was like that money did not exist.

Zach Sikes - Yes, it was subject to assuming the existing financing.

I have a piece of land behind an existing rental that is almost 1.5 times the size of the standing triplex. 

This amounts to lost opportunity because if you had purchased RE, at the closing it can start producing return. 5) ADUs detract from the existing structure whether this is privacy, a garage, or just yard space. 6) this is related to number 1, but there are many more buyers looking to purchase homes for their family than there are RE investors looking to purchase small unit count properties.

THis is a scenario, its not a deal im working on, people sometimes have accidents or what not and need to get out of debt fast, i know this type of deal exist but i dont know the name for it.

If you don't get clear direction, then it might be a sign to offload it, especially since it's free and clear and your ROE trend is non existent right now.