In my experience, most agents aren't going to be helpful here (some exceptions).You can ballpark these things after getting some data:Rent:  use the sites  you think you're future tenant will use to find you as a landlord (Zillow, Rent.com, a big property manager in your area, Craigslist) and look for similar places in similar neighborhoods. 

Buyer will be less qualified for the same amount of loan; in plain English, buyers cannot afford the price of the property that he or she is looking at to buy at the higher rate….An educated buyer agent should search more (work harder) to find a similar property for his buyer, it is not a bad idea to search for motivated sellers or short sales.

Did you get any of the appraised with similar results?

I don't have the capital myself and would only consider creative methods for my own BRRRR or similar project down the road. 

The asking price is $80k, in a C neighborhood, the market value of a similar sfr is $35k-40k.

I do see how it could be viewed similar in a way .Lending has definitely loosened up and I’m sure there is some shady things going on that we won’t hear about until it’s too late/after the fact .Subprime lending is back and growing just as an example .

Similar stories for 30310, 30311 and parts of 30315.

You could do something similar that way qualified buyers can peruse the list on their own and let you know if they want to buy.

Then buy two similar properties and just split them between you. 

A tip I got from @Steve Vaughan is to post a few ads on CL or something similar in your area, without the address of course, to figure out the demand in your area.