A government shutdown is being discussed. 

A Solo 401k is a type of Qualified Plan that is governed by those rules.The takeaway is that in your scenario, if any of the entities have full-time employees, a Solo 401k would not be an option.

I keep seeing in the CRLTO that "dwelling units in owner-occupied buildings containing six units or less" are not governed by the CRLTO.

Long,The suggestion in the book is advised because as a Realtor you'll know and understand more about real estate; the laws of the state that govern real estate is a major advantage.

I currently own a commercial printing and graphic design business. 4.

I think the major employers in the area now are Michigan State University, the State of Michigan government offices, and local healthcare.

This is plain and simple government interference into the market.  

Just print out some deposit slips with your account number on them and provide them to your tenant(s) who can then go to any branch of your bank with cash in hand and deposit the funds using your deposit slip. 

Does anyone know if it is possible to get a government grant to start a REI Business?

Oh, you mean all the money they are making from government bailout cash paid for by the taxpayers.