@Derek Bell, as others noted, the releasing/retenanting is the biggest risk on any commercial deal.  

It depends on the number of Units, Residential or Commercial, Apartment Complex or mix of Single Family and Multifamily.Under 25 unit - Tenant Cloud, Rentech.Under 100 - Then Doorloop/Buildium.100+ - AppFolio, Yardi, Rent Manager.Apartment Management : Yardi seems to be wildly usedSingle Family ( Mixed ) - AppFolio seems to be popularRent manager has a good customer support team.

Foreclosure auctions are on the table, although least preferred due to the lack of interior access (maybe with more experience).

Talk to your agent to get a little more information about this.I agree that if the unit is not permitted to be rented on its own, then it's probably best that you don't rent on any platform illegally.However, if you are able to allow access to the main part of the house, you may be able to rent the space as a room in a home depending on local laws and ordinances.

i didn't even know auctions gave opportunities to actually have access to properties beforehand.Given your line of work, i would say that you are uniquely positioned to work well in the outlined situation.

If you have a commercial residential property (>4 units), the value is based on NOI.   

Excited to connect and have access all the resources that this awesome community has to offer.

But then I was tapped out on access to funds, so I switched to creative means, obtaining the next 3 properties via lease-options.

Hey, all, I've started scouting lenders for when I graduate from my MD/MBA course in the spring and am able to access my physician loan. 

As a realtor I have access to many listings.