Looking into single family houses or multifamily, as there is an actual land that you own and potentially build ADU/DADU in the foreseeable future.

3) Where can I find accurate market data such as school system ratings, population growth, median household income, and crime rates for specific neighborhoods in Orlando?

If you're the kind of person that needs hard math and graphing to understand things, this is completely the book you need on building wealth through duplex living.If your wife is behind you in this idea, and can see it as a move to financial independence, congratulations, you're in the small minority, as I am.

I just don't know if I will be happy or feel safe living in some of the homes/neighborhoods that I would be able to afford paying cash for.I've heard opinions for everything from 10 year, 15 year, and the 30 year mortgage options.

It is code here where I live to have moisture barrier as part of the build.

"Old" ones are with the previous theory of build 3em to last and to be repairable.     

I purchased my first rental property - a newer home in a high-appreciation market and neighborhood - with a business partner, and she and I have had the hardest time getting it rented.

Building a new duplex to start my real estate career.

I feel like I should be looking for bigger investments yet I’m comfortably investing in small multi family and single family homes here with high equity build potential but very low,if any, Cashflow. 

There's a property in the neighborhood I grew up in that I'm going to bid on.