I will say my firm uses several off the shelf and custom built solutions but that is because of the size of our portfolio.  

Pretty much everything I thought I knew had to be put in a box and stored on a shelf.

Go to a big box store, buy off the shelf cabinets, have someone install them.

I play in the entry level market and it is all pretty much straight off the shelf from Home Depot.

It's my understanding that there are infinite ways that these deals can be structured, but I'm just looking for one example, broken down, so I have a jumping off point to become creative.

If you're looking for an off-the-shelf floorplan contacting some manufacturers might be of benefit to you.

It needs to be structured correctly for purposes of investing (aka “infinite banking”).

Appraisal issues being one of them.There are several reasons why this happens:Appraisals have a short shelf life.

Better shelf life. 

BTW, if you get involved in any seller financed note or installment contract, your cash purchase changes to complexion of an equity financed obligation to the extent of cash paid as a funded loan that can impact foreclosure and deficiency aspects...but that's another matter.Impressed with your recognizing the importance of pre-origination aspects as well as post closing matters.There is no flow chart that I know of for note due diligence as there are infinite concerns that may need to be addressed and the road can take sharp turns without notice.