Post your house address, floor plan here etc. Maybe somebody else can buy it. If both you and the potential buyer go to the builder and discuss with them, the builder possibly can do you a favour and transfer the house to the new buyer. The new buyer will pay you back the 10K deposit.
Ask the sales person if you can provide another name to own the house when closing. Also tell the sales person that you can do it through a lawyer and the actual owner's name(s) will be provided a few weeks in advance before closing. As far as I know, some builders agree to do so, but haven't tried it.