Specify whether those flex areas have a door for privacy so they can function as a true bedroom or not. 

If you are hoping to get multiple groups or families in there, you will need to create some formal bedrooms for privacy.

I think the privacy is high on my personal priority list as well, as i may have been going overboard by researching soundproofing solutions between walls and am actually in the process of adding another layer of drywall.

This amounts to lost opportunity because if you had purchased RE, at the closing it can start producing return. 5) ADUs detract from the existing structure whether this is privacy, a garage, or just yard space. 6) this is related to number 1, but there are many more buyers looking to purchase homes for their family than there are RE investors looking to purchase small unit count properties.

Bought as our primary because we loved the privacy and location.

I'll try to make house as sound proof as possible but aside from noise, do nurses generally feel unsafe since it's on the main road, more public exposure (lack of privacy), and more dangerous?

I don't know if there are privacy protection laws preventing this in Canada though.

For privacy purposes, I don't want to put my personal home address on the deed of an investment property, nor do I want my personal address linked to my LLC.  

I told them I wanted more privacy and that it felt like I was living in a fish bowl.

I value my privacy so not crazy about renting out rooms, but I will if that is what makes most sense in todays market.