I would think this would cover anything related to business, which if you're going to build a real estate portfolio would be very helpful, especially if/when you incorporate.  

The accessory dwelling unit shall incorporate the same or similar architectural features, building materials, and color as the main dwelling unit on the property.

When I worked in corporate America I did a great deal of reverse engineering.

I'd like to incorporate the BRRRR strategy on this one.

Does your corporation or LLC have Articles of Incorporation or Organization filed with the Secretary of State’s office?

They promise paprs of incorporation, minutes of board meetings, a company seal... basically a business in a can. 

I will incorporate these tips into my next analysis and for my consideration of macroeconomic effects in my area.

@Angel SanchezThe s-Corp requires filing for articles of incorporation and corporate by-laws.  

Incorporating as an LLC and attempt to get a commercial loan at the slightly higher rate2.

Obviously you have to live there, but it's one of the least expensive ways to get in and it spreads your risk over more doors.Single family is great too, but something you might want to incorporate after you have gotten started.Any asset class can be great if you are buying below market value with an opportunity to cash flow.