Been racking my brain on this topic.I try to keep these thoughts in my mind, often conflicting because today, this very moment, things look crazy:"The best time to was 20 years ago, the second best is today."

Most long term good tenants are all M2M.The advantage of beginning with M2M is the fact that most evictions will occur in a tenants first year of tenancy. 

How often, and why, do you switch your personal or business accountant?

They are dependent on the age and current condition of the property and the quality of tenants you have. 

I have seen this situation all too often with young unmarried couples. 

@Daniel Walters how often do you visit Dayton?

I've found that most often, those who do their due diligence, regardless of the strategy they've employed, have been successful.

It is generally best to stay away from those properties for a number of reasons.1. as others have told you the work is not always done properly2. trying to squeeze 2 units out of one can often leave you with weird floorplans that have small rooms, doors to nowhere etc.3.

And sometimes and very often more when the buyer gets their own loan 2, 3, or 4 years later. 

These folks are often ready to downsize or transition to assistance.