Terrel-
I contracted my own house and took some risk. I saved some money. That savings is your EI. Many small builders are carpenters and thus get their labor and EI in the process. Building fills the gap between custom projects.
I refer you back to my question in post #30:
You have a choice:
A. Build a house and take all the risk involved with that endeavor at a total, all-in cost of $500k and you are confident (but not certain as there is market risk) that the house will be worth $500k when you are done.
B. Buy the exact same house with no risk for $500k, complete, and it is worth $500k when you buy it.
I think you are going to choose "B".
You'll choose "A" if the cost is less than $500k to construct (all-in) and when the spread between what it costs and what it will be worth ($500k in this example) is enough to incentivize you to take on all that risk. That spread is EI. It is what it takes to incentivize someone to pull the trigger on the project.
Likewise, would you build a house at a cost of $500k (all in, no EI) and then sell it for $500k being confident (but not certain as there is market risk) that it will be worth $500k when you sell it?
If I owned the land, I signed the contract with you, and I'm going to pay you $500k (construction costs + contractor profit) no matter what the house may or may not be worth in the market. Are you going to expect the same profit if you own the land and take all the risks that I'm taking, for the same level of profit you'd charge as a contract without the risks?
If you'd do the later, I tell you what: move out here, and I'll find land that (a) you can buy, (b) you can build a house on, and (c) I guarantee to pay you the sale price of that house less my selling commission.
I'd rather have you move out here and do it because I can make plenty of money off the selling prices here whether you take a loss or not. I'm not so sure how much I can make in Arkansas.
I'm being facetious, obviously. You'd never agree to the deal because you are taking all the risk and only earning what a contractor would earn when taking they take none of those risks.
And, when a contractor takes those risks, they are requiring more "profit" than if they had a signed-contract just to put up the improvement. That "more profit" is EI.
(But if anyone else wants that action, please let me know)