I don't want to live in a mansion or have sport cars (nothing wrong if that is what you like, but that isn't what would make me happy).I plan on retiring in about 5 years before I am 60. 

I've found deals in local online groups on Facebook, simply asking people for what I want. 

You should be able to send it to the court clerk with the case number (you should be able to find it online or call the court).

Always validate what you read online, things change, I could be wrong, but use this as a starting point in your research.What Is an ADU?

Definitely online via property management software!

I think I've talked to maybe 2 tenants on the phone so far, and I didn't mind because there's a lot of scams online.

If they are available online or in person.

Atlanta MSA is great and growing, but Multi-Family supply coming on line there both now and through next year is significant, wouldn't this be a better/cheaper deal 1 year from now?

There's also free services for tenants to pay their rent online which include some light accounting features.

We live in California at the moment and I have W2 job and my wife a small online business.