Start game play and build a castle using 1 ton of wood and 1 ton of stone. After the castle is completed, extend the boundaries until 100 tons stone and wood are required for the expansion. Leave the castle screen and quickly demolish the castle before it is built to access 65,000 tons of stone and wood.
Acquire 1 wood and 1 stone (you can buy them from a merchant for about 300 crowns), then use the 'design a castle option' selecting a single tower and place a flag on the tower. If chosen correctly it will show 1 wood and 1 stone to build. Select build this castle and make sure you have builders assigned on the Labor screen (40 or so should complete this in one turn). Once the "castle" is built, choose the option to look at the castle. On the new screen choose the "Extend this Castle" option. Start extending the castle (single tower) by adding new towers, walls, and halls until it shows 100 wood and 100 stone needed and choose build this castle. Don't use any water because that doesn't help add to the wood or stone needs. Go back into the "Look at the castle" option and choose "Demolish this castle" (under the castle name and image). Check the merchant screen and you should have over 65000 of both items (wood and stone). CAUTION: Make sure to keep your crowns (money) at around 30,000 or below to avoid a glitch that will require a restart.