If you have a level where you are near plenty of stone, build two to four Quarries. After that, make the same amount of Ox Tethers near them. Increase you stockpile to about six to nine. Keep working on getting stone. You will still have to work on other things to protect yourself. After several minutes (if you do not waste any stone or use a little), you will have 500 or more stone. If you built a Market already, you can sell your stone for about 100 to 350 gold each, only letting you have a choice to make low, average, or no taxes at all.