Verifying last 2 years of rental history and income extremely important to find the “best of the worst”.Make sure you understand the Class of properties you are looking at and the corresponding results to expect.The City of Detroit has 183 Neighborhoods we’ve analyzed.DM us if you’d like to discuss this logical approach in greater detail! 

I would put it in your listing details and also potentially house rules. 

Are their listings detailed with good-quality photos?

The guru your son is learning this technique from is likely not telling your son that the deal will almost certainly encourage your son to get an "off-market" deal from a "wholesaler" who is unlikely to properly disclose the details of the property or encourage an inspection. 

Give me a call today, I would be happy to go over the details / price out your scenarios.

Well, we are getting into the cold months and without going into too much detail, it's become extremely scary to talk with them and try and amicably handle requests.

Here's a bit more in detail about how rates are calculated for DSCR loans:1.

What about a duplex in Sav like this: https://www.realtor.com/realestateandhomes-detail/1514-Augus...?

I wasn’t trying to be long winded, with too much detail, in my initial post but I actually did this method on a fix and flip.

@Brian Eastman , @George Blower , and @Dmitriy Fomichenko are all experts in the SDIRA/Solo 401k arena and, I'm sure, will be happy to give you more details.