[Superman]

This has all the markings of a disaster. It will get worse before it gets better. As expensive as it would be, it would still be cheaper to *****can this contractor and get someone decent. One that plans to start the project on his dime, and you pay for services AFTER they are performed. It is a red flag when contractors ask for money up front. And another red flag when they pour a foundation in the wrong dimensions. And when they ask for more money before they've spent the first 'draw.'

Good construction contractors are expensive. But not as expensive as bad construction contractors.