Nonetheless, if you buy right it won't matter and a little while down the line you'll be very glad you pulled the trigger when you did.

Technically that could trigger the due on sale clause in the mortgage, but I've never heard of that happening.

There's a lot of work to be done by the investor before pulling the trigger.

Offer your self to help investors and put our time and then once you have that at least 95% confidence. then pull the trigger ... 

Most jurisdictions will have language that tells you what will trigger the unit being reverted back to a SFR.

So many "investors" will take an agent through 10 houses (filled with tenants) and either never pull the trigger, or offer some ridiculous low-ball offer that does nothing but piss off everyone involved in the interaction. 

I am curious though as to what part of my original post triggered your millennial radar.

Load the gun, wait to pull the trigger. 

The biggest lesson of all I learned on this property was learning how to just pull the trigger.

I hope this info triggers you to ask more specific questions and I hope I can find a way to help you!