I was originally drawn to it because I wanted to have one place where all my tenants paid rent and where they had the option to set up auto payments. 

I would like to know more about ways to use OPM  The only way to determine if the home is going to cost you a lot down the road is by determining the age of the mechanical systems & if the structure of the home is sound. 

It will auto download bank and credit card transactions, give you reports by account, category or property in any form you want. 

And in underground parking is mechanical's.

@Jay Chung If the mechanicals for the duplex are in the basement it may be better not to give the tenants access.

Call the mechanic or gas station up the street and ask the owners if they know someone.

Quote from @Alex Silang: I've been thinking about this for awhile but unsure how the exact mechanics work. 

Not only will lenders be effected, but borrower credit, business loans, inventory, and auto credit will suffer when those effected have to relocate, find long term replacement housing and their livelihoods and income are destroyed.

However, these properties generally have a lot of land improvements that qualify as well as certain portions of electrical, mechanical and plumbing that can qualify.

I just noticed your auto seems a bit, well junky.