I see that invoices or links can be sent.

After going back and forth with different people about what our best option was (submitting an invoice to be paid at closing, signing an option with seller and recording it, etc) we decided that the best and only sure way this deal could happen was if we recorded an "Affidavit and Notice of Interest in Real Property" (which states we have a contract on the property) and put the buyer and seller in contract directly.  

Have them perform specific tasks and issue invoices that the LLC would pay.

Can I send you an invoice :)

Enter a maintenance request, assign a vendor, attach a fake invoice.

I would start by paying the second GC to write up a short statement explaining their expertise, what they found when they were awarded the job, what they did to fix the existing work, and attach a copy of their invoice.

Enter a maintenance request, assign a vendor, and attach a fake invoice.

Dang Bro, you should have checked a lender before you started construction. 

But with my many years of experience with Behr, mostly the Marquee line, they are pretty dang  amazing.

Dang you got my attention.We had a 10 year old kid running around in the dark and fell in an area that was about 3 feet down where the entrance to the basement is on the end of the house.