She managed the real estate properties that my parents hold.

My parents had rentals and they looked at them differently than I did (interest rates were also different).You ultimately need to be comfortable doing what you are doing and educated in it. 

Books have really been good for them, because sometimes kids don't like having their parents "tell" what to do lol.

Looks like a helicopter parent situation.

We are still diligently screening the tenants and they are agreeable to using their parents to cosign in one way or another.Can I have one parent cosign for the group if they agree or does each individual renter need a cosigner?

I'm a parent of college age kids. 

And I assume they will allow poorer individuals the tax credit too, not just folks who can afford the $5 latte but are living in their parents basement.

Since I’m living at my parents, I’m able to save quickly but I do plan on buying a duplex right before marriage sometime in 2021 if all goes as planned haha.

The Series LLC acts as an umbrella, a parent of sorts, and can create individual child series that are treated as separate entities. 

Also as a parent that seems like a legitimate request to me.