I'm considering spending the $200 annual fee to get a pro subscription to Rentometer Pro.  

Subscription based, flat fee (~$20/mo) and I can just copy other asset managers.

This of course is county specific, but I know in Gwinnett they have an office designated for researching the estate owners information as it is all public or they have a subscription you have to pay where you can get access from home at anytime.In regards to your question about finding out about the owner, if listed on the tax assessors office as an LLC then go to the state website (sos.ga.gov) and look up that business, which would give you the registered agent as you mentioned.

You'll need a Private Placement Memorandum, subscription agreement, and entity paperwork and depending on the structure, they'll probably need to be accredited. 

The subscription Pro Plus desktop version is the most cost effective.

QB SE is charged by monthly subscription.

Magazine or newspaper subscriptions?

We have an operating agreement, PPM, subscription agreement, heavily sanitized (by an attorney) marketing materials, etc. and everything is well-vetted with a securities attorney with decades of experience.

As for a tool you can use: a lot of times its a subscription service to the software that's used, kind of like MLS, and you have to have some type of legal, law enforcement, or fraud detection credentials to be able to get them.

In other words, it's "in the cloud" instead of on your computer and you pay a subscription fee to use it rather than making a one-time purchase.