If he failed to pay, it could be construed to be a failure of consideration so the deed fails and she's still in title with him and all he can convey is his half. 

Quote from @Nick Grassi:Not sure about Florida, but my experience with solar.. 5 years or more ago, buyers would take over leased panels and not have any issues with getting a solar lease from the owner prior to them.

My limited experience with the Gurus is that are very rarely price competitive and target newer buyers.

I would like to assist two of the owners find a buyer for their parts of the business/real estate.

You use those things as leverage and a plus for the buyer pool.

It will not cover foundation issues Thankfully, no EMD was used in this during this deal.If its unlike for them to sue, how does situations like this normally play out if Buyer doesnt want to terminate?

At the end of the day, the sellers looking to transact in creative finance transactions are normally the owners of real estate that cannot sell easily in an arms length transaction or are gouging  the buyer on price.

Of course, developers (sellers) and builders (buyers) have debates a lot on those various line items in the proforma (especially hard and soft costs).

If buyer's story matches seller's story, how do they find out?

I am in Memphis TN and I have buyers looking for property.