After the stabilization period that comes with the transfer of ownership of real estate, and starting to execute your business plan, you’ll find a lull of activity and an excess of capital with no place for it to be put to work.

That seems super excessive.

I successfully completed my first one nearly thirty years ago.Of note to would-be players: Surplus funds are generated by mortgage, deed of trust and certain types of lien sales whereby the forced sale generates an excess above the secured debt and cost of sale. 

When told that it would cost $X, an amount which the Client deemed excessive, he was asked what he thought the return would cost.  

I don't need lump sum, I need excess to equity when I would need, aka HELOC like investment.

Anything in excess of 10% is very good.

I am usually for solar, but this one is excessive.

Additionally, you and the seller agreed to handle and shortfall(Yes keep in mind you could have been shortchanged as well) or excess will be handled outside of closing.So, if you owe the money you should pay it just as you would expect the same. 

Do the investor or original owner have an opportunity to recoup these excess funds?

Have you had any issue with crime or excessive damage to the place?