Don't attend the national roadshows training, but if there is a local guru that teaches classes, invest a weekend or whatever they offer.   

I am not a Charlotte BP'er but I can offer my opinion.

My options for fixing this were extremely limited, almost non existant.

However, you are going to forfeit any Earnest money you have deposited onto the home(more than likely anyways, it depends on the fine specifics of your contract on the offer letter).

Reaching out to them and seeing if they are actively investing and offering the property is a good start.

Big banks and banks in general often do offer great terms for jumbo loans, especially if you are willing to bring your assets over under their management. 

I made an offer on the spot!

I feel like if they had a death in the family or something like that we should offer them a stay at a different date for free since they already paid.

The only benefit in this instance, as an investment partner in a JV, or member in a multi-member LLC, is it's an act of "good faith" on my part in the agreement, being extremely transparent about the project's costs for the construction company, and the specific amount the partner/member invoices as profit or salary attributed to construction services on the specific project (I differentiate profit from salary, as it depends on the size of your construction company, a smaller company the profit may be the salary etc). 

I'm looking to buy a rental property in an LLC with funds a parent has offered to pay in the form of seller financing.