@Olga K.It doesn’t necessarily confirm the sewer line is completely blocked—it might just be an issue with the internal plumbing or fixtures.

My portfolio is nowhere near what is needed to replace my current income so I would have to quit and become a full time realtor to make up the difference, but that sounds better than being stuck in my cubicle.Was there any issue with being at 21 properties and thinking you were close enough, why not quit then?  

The enforcing agency certainly cannot take action against an unpermitted unit without citing a specific health and safety issue to address.  

The issue you will have is that finding out what a property actually rented for is difficult.

Eamon,Any time you face a major issue with a bank/lender and they fail to refund your money or it costs you money and a lost deal due to ignorance or bad lending. 

Depending on how you are acquiring these properties you may be able to just do one per year but that only matters if speed is an issues.

But you do have to put some language in your lease  agreement or lease addendum that deals specifically with issues that will come up for the fireplace.  

Yes the biggest issue was they grew way too fast and he set up an entire servicing company to handle all of their deals.

I have had absolutely no issues.

Let's analyze each issue you've mentioned:1) Tenancy Length: besides issues a landlord can't control, like death, sickness, job loss, etc., the actual management of the property & tenant play a large roll in how long tenants stay in their home.