Typically though any PML is going to want any partner in the deal to have skin in the game, otherwise they're essentially a buyer/flipper and that's a different value proposition.

When I was a kid a trip to Disneyworld was a once in a lifetime proposition for a lot of people.

I've had other conversations with the potential buyer and they seemed to clarify that their proposition is a "subject to" and are proposing a "wrap around mortgage" to help secure up the payment default risk which seems to take some risk off the table from a Seller standpoint. 

Crypto's biggest selling proposition is also its biggest disadvantage: decentralization.

There are ALL kinds of brokers with a million different splits/fees/value propositions.  

Now that the interest rates are much higher in the US, the appeal of that proposition has pretty much disappeared.

As long as it's not called "Set for Wife" with detailed charts breaking down the value proposition of marriage in the 21st century. 

That is, as others have hinted, you need to bring to the table the knowledge your prospective investors may lack.So, that's where I recommend you start: learn how to raise funds for deals, and what you'll need to know so you can illustrate the value proposition a deal may represent.My $0.02 ...

Now, upon doing some reading I am not sure if that is a appropriate (legal) proposition of me, to ask him to surrender his security deposit as apart of his early termination fee.

As a first time investor who is learning the business, it is a much riskier proposition.