In this way the market self regulates, supply just diminishes.

My guess is you have a diminishing return for the 4th bedroom/ 3rd bathroom at your primary when you consider the amount of money you spend on that vs the increase in equity in your home.

As the corporation grows in size and as your deals grow in size, the expectation of personal recourse by the lenders actually diminishes.

Turnkey has its please in REI, which is why these companies have done so well over time, however understand your returns diminish as a result of them doing all of the work for you.

Why does it peak at a certain point and diminish after that?

I wonder if there has been significant growth over the last 5 years that the growth might start to diminish in those areas, and more growth might start to happen in some other areas that have smaller arrows on that chart?

This runs contrary to the expected outcome (see the law of diminishing returns).

Because there is no greater motivator than a diminishing supply of something you need. 

My concern is that because of these issues, I do not want the market value of this property to diminish In order to mitigate the aforementioned concern, would something like buying that piece of gravel road from the landfill company (or even attempting to do so) make sense?

I have been aspiring to become a real estate investor since 2019. however, because of events that transpired, circumstances that changed, and my own motivation that diminished I have not started.