I understand a lot of subject 2 was done post recession years and it worked great.

I don not understand what you are saying Of course its ok to pay a mortgage with whatever means you have The fact that you want to buy the property then you would either apply for a loan or use cash or buy subject to owner financing.Once you own the property you have to pay the loan no matter if you have renters or not  

The one side is listed for sale individually for $660k, and I found this posting on Loopnet: http://www.loopnet.com/Listing/1550-1552-Perry-St-...I'm not really considering attempting to purchase it, but from an academic and market understanding viewpoint, I have to ask: Even with the crazy valuations and sales prices, is it worth this much? 

My understanding of raising rents in Ontario is a percentage based system that caps how much you are able to raise rents.

There is a finite number of existing parks and more and more cities don't want them but they fail to understand the tremendous need for this type of affordable housing. 

I certainly understand your aggravation!

I designed my own house and it took me awhile to understand what can be done using cost saving design strategies.

I understand you can ask to see a rent roll when your offer is accepted. 

If, so look into mass housing or FHA for owner occupied- You can invest with 3.5% or 5% down--- Understand what areas you want to invest in.

Personally, I will drive and walk on different days and at different times to get a really good understanding of an area.