I both personally invest in real estate and help others gets started/expand their portfolios in various Midwest/midsouth markets.What I do with my kids: My wife and I have 2 of our rentals that are on the same street, with a home in between them.

Links to 2 properties in Nashville and 1 in Memphis using the same approximations. 

@Shay Yao Here are the answers to your questions regarding permits in Gwinnett:Renovating an unfinished basement into living space?  

As always, I trust you in all advise!!

I am looking for a firm that has experience appealing property taxes for residential homes in Detroit, Michigan.

It is presumed that "Multifamily" housing will have multiple families inside.

If I put all of my eggs in one basket (Florida in this case), paid off property and a hurricane blows everything away, FEMA is nowhere to be found and the insurance companies take years to pay what little claims they actually do pay, I suffer through it in a blown out house.

Great tools out there to evaluate the density of rentals, houses sold/for sale like Zillow and Redfin can give you a great perspective on these and help guide your decisions!

@Jason Weidmann admire your all-in approach!

For example, if a seller comes to you, looking for you to help them sell their house, your first responsibility is to help them get the most money for their house, and not try to buy their house as an investor for cheaper.