Just a word of caution about Metro Detroit, it still has a large portion of its economic activity related to automotive. 

The process for commercial properties is basically the same as residential properties, so it takes work.Again, echoing Dominic, a good investment is a good investment, whether you spent 8 months courting an owner to get them to sell to you, or whether it is on CBRE/Cushman/Marcus/Loopnet or any other brokerage website.  

There are a lot of websites that offer the course online, or if you have a college near you, they also typically offer a class that satisfies the pre-licensing requirement.

Here is the link to SAREIA website: https://www.sareia.com/ I hope this helps.

We added value by furnishing the property, added 2 decks (one for a solo stove, and one for a large hot tub), improved the gravel driveway, mulched the landscape, and added a lot of string lights.

The impact of not having F/f financing is large (>10%) if the appraiser recognizes this potential issue.  

I mean myself and any bank would need more details, but if you utilize that large sum as a downpayment and have a small mortgage, wouldn't you easily qualify for the debt to income?

Unless you've done substantial improvements to the building or used a large down payment when buying, it's unlikely this will work.Perhaps your best move is to find a new primary residence that is 2-4 units and repeat the process.

It's actually Excel-Easy.

I have a client in KC that rents a large home in the urban core to a social service org in the area that feed him tenants.