c) how can I get better at marketing (in general) & marketing for Sellers any suggestions would be helpful.The current changes in CL doesn't really bother me to much, I just want to know if I'm waiting my time?

I want to give my clients the best value and service and I can't think of a better group to get insight from.

Then, when something looks odd, you can reference the deep-dive report to better ID it:)

It depends on what the terms of your mortgage are.Pros-with no mortgage, you have higher cash flow.Cons-if you plan on buying more properties, you are better off saving the money for a down payment for your next place.The big questions are: can you get higher than 7% return if you invest that money elsewhere? 

2.How can I better evaluate and communicate an investor’s return on investment (ROI)?

Every property will bring its own lessons, so just be ready to roll with the punches and use what you learn to make your next investment even better.

One looking for cash flow might find a better place than someone looking for appreciation. 

I'm just trying to get a better sense of what my real risks are? 

Will be better from now on.

Real estate seems to be capital intensive.I think having a business plan, being financially ready to invest, and knowing your end-game before starting will put that person in a better position than others.