However, pricing for the services depends on many factors1) how complex the books are - separating a bank account for each property simplifies the bookkeepers job.

@Brian Garrett I am not trying to over-simplify things here but I will for the sake of brevity..So I could potentially accumulate multiple properties over the next couple of years which are all free and clear due to my getting my initial money invested back from these strategies?

To over simplify, historically  any coastal states will have a greater appreciation in value then in land states, however middle states have a greater possibility of cash flow, in part due to their lower entry price. 

It is more complicated than that, but that is a simplified explanation.And one more thing.

I know that's is simplified but its logical..

Do not over simplify it. 

Can someone please be kind enough to simplify seller financing?

In a simplified nutshell; I’d have 3 SFHs with healthy positive net cash flow that can fund all expenses included a significant maintenance issue that might pop up + 1 SFH with zero cash flow, but expenses are funded.Thanks!

As long as your rents are good and you're getting the types of properties and tenants you want, this simplifies THINKING about it such that you don't need some crazy calculator and excel sheet to do the analysis on the purchase side.My view is that is much better time and thought energy spent on the actual construction as there are a thousand ways to control costs and bring value in a rehab.

People are afraid of technology, but it can truly simplify everyone's life if people are willing to try it.