(During this whole time I continue to market/show the unit. I

Keep moving the goal posts back until the desired outcome is achieved. 

Turns out, someone flipped the switch off to her heat, and the switch is in the hallway that she shares with another unit. I

Of one unit is vacant, at least you have money still coming in on a monthly basis.

I know some landlord's show up with something for them to sign or fill out that they previously (on purpose) forgot to give them, but you could also just be upfront and say a visit is part of your screening process - you check the condition of the rooms to see how the unit is being taken care of.

Now that the unit is finished, it's going to be listed for $2,450/month and the same model on similar lots are appraising for $410k.

If I invest in residential RE, it is not to achieve returns barely above passive options.  

Alex is the man, couldn't achieve what we have without a partnership like ours! 

Again, interviewing multiple is a great way to figure out who would work best for you and what you're trying to achieve. 

The goal is to achieve and maintain financial freedom.