The mistake could be costly.

This will create more costs. 

Can try to reposition to Class B, but neighborhood may impede these efforts.Vacancy Est: Historically 10%, but 15-20% should be used to also cover tenant nonpayment, eviction costs & damages.Tenant Pool: majority will have FICO scores of 560-620 (approaching 22% probability of default), many blemishes, but should have no evictions in last 2 years.

Is there an easy way to divide the basement up? Each side of the duplex has access to the basement but below everything is connected together and I want to make sure no side has access to each other. The way I can ima...

Also, what are some other low cost amenities that I can add to my STR that will yield a higher ROI?

I always assumed that the buildings in that area were condos and flats mostly.  

Thus, I'd expect something like the following for the next three years for US rents: 1) 2025 will not see much national rent growth as we continue to deliver so much supply that prices remain largely flat.

It is flat out not worth the headache, impact to other members and having to find new members anyway to fill all the spots that left because you wanted to fill a single room. 

Purchase price: $330,000 Cash invested: $15,000 Legal 3 Flat (that was not for sure in the beginning).

I'll throw in my 2 cents on common differences I've seen in my career:CDFIs - Because of their subsidized financing structure, they have the ability to be a low cost lender (and sometimes provide grants).