My house has a basement with one bedroom, a bathroom (without a shower), and a good-sized laundry/office space between the bedroom and living room.

I think think the size and amenities are going to be your most important. 

Local bank or credit union would be the best fit on a deal this size.

Expense ratios vary dramatically depending on project size, age and other factors, but basic rule of thumb is the smaller the project the higher the expense ratio's, using a 33% expense ratio for a small facility (less than 150 units) is optimistic, smaller facilities are probably closer to 40%.

If I were to invest in a GP and on the org chart were people with no experience that is an absolute no go.

Regardless, though, expect higher points and fees overall because of the smaller loan size. 

Building Size 21000 SQft . 

It's Title 10, Chapter 1, Article E, Section 6, the final paragraph before the charts start. 

While you may have a 2Br that is not for the "typical" sized family, you will have many people also looking to downsize from their larger homes that they are holding on until the summer to list. 

I know a lot of residential brokers are also selling small to mid sized multifamily in Michigan.