If pressed, I would only offer "we made a business decision", but even that is going to prolong a conversation you would prefer not to even have.  

I just had a conversation with Property Meld, a company that focuses on maintenance.

Let this thread to be a place for constructive, productive conversations, networking and working together to make some money and bring some positive light to this frowned upon industry in RE world.Thank you all for your insights, opinions, comments!!

If such is the case, the tenants in the lower flat will hear the tenants in the upper flat walking around, and kids running around upstairs can amp up that noise.If the flats have a common forced air furnace (or if there are two furnaces in a common basement or attic), muted conversations will make their way between the units.

I joke I used to be a normal person who could hold conversations about small talk like who won the Oscars or the latest in sports. 

It likely will not go well because you are way too late on this.If you were a tenant paying rent would you want to just get a letter from the new owner telling you to get out with no prior conversation or warning?

Even a hands off garage conversion ADU is significantly more costly than $100k.  

, that's just the hook to get the conversation started, ask them about the property, condition, motivation, etc.

I'll have an in-depth conversation with my accountant about how to structure this

Of course, not knowing who is living there may have other risks, such as, are there any convicted sexual or violent offenders living in the home.