Yes. Just increase your pledge by the amount of the game PLUS the shipping price for your region for each additional copy of the game.
Unfortunately no. Full shipping price will need to be paid per game.
Yes. The cards are the same size.
Yes. The insert is being designed to hold sleeved cards.
US shipping is free.
The estimated weight of the finished Deluxe version is between two and three kilograms.
Don't see the answer to your question? Ask the project creator directly.