I can't give any specific names on BP, so yeah..The criteria is unique, it's all based on your end buyer being lined up and ready to close, so I'd suggest building a buyers list first, or get in contact with agents who work with cash buyers. 

It sounds like it use to be a little clunky back in the day, but has improved - but couldn't find any recent discussions on BP about Rent Monitor specifically.  

Specifically  flipping houses, and buy and hold in the Georgia market.

A cash flow analysis determines whether I buy a specific property.  

I am interested in learning more about Buy & Hold rental property investing, especially in specific areas of Ventura County, California and Cleveland/Lakewood, Ohio.

You really need to focus on a specific area.

If you have any specific questions, you can reach out on these forums and you will undoubtably receive a lot of good feedback.Adam

Now I've found a property that would be the first one that I've bought specifically for a Buy and Hold investment.

Instead of a specific dollar amount per door you should look at what sort of return you're getting on the money you put in. 

Cleveland is a very big area, if you get more specific you can be pointed in the right direction to a PM that manages in that area.