In 12 years that I managed my own rentals in ON there had been a few instances where I had to deal with problematic tenants and each time we resolved our issues without involving LTB.

I thought you would never ask.There is a famous saying by George Santayana, "Those who cannot remember the past are condemned to repeat it" that applies nicely to the situation we find ourselves in today.

For instance, someone might find a 100k spread on a deal like this perfectly comfortable.

There are places famous for REI that charge over $5-10k just for planning and I'm not sure whether I'm there yet. 

Getting funds into a Roth Solo 401K is somewhat limited, for instance Roth IRAs can not be transferred.(#2) One should not ignore the "tax dog", I assure you the compromises between tax deferred qualified accounts, RMDs, Medicare IRMAA, SS, etc is confusing. 

For instance, I have a property that started as a HH; when rates increased, re-fi’ing wasn’t an option, but the property had a layout and zoning that was conducive to adding an ADU—which I did, greatly improving the property’s cashflow.

Fort instance, Zillow and its affiliates control over 70% of the market; which more than fit the definition of a monopoly.

Personally, I think of C-class like Jordan Belfort's famous pink slips.

Mortgage loan applications decreased 5.6% last week, for instance.

One way to find large bedrooms is to look for houses that have a very large sq footage, but relatively few bedrooms (for instance, if the house is 3,000 sq ft but only has 3 bedrooms, chances are, those bedrooms are ENORMOUS!)