IT'S UP TO YOU TO CHOOSE THE TYPE OF TOOL YOU WANT TO UPGRADE, BEING BARN OR SILO OR LAND.
YOU MAKE FRIENDS WITH 1 FIXED ACC, THEN BUY UP TO 89 TOOLS PER DAY, WITHIN 30 DAYS.
Your account must be 40+ level
And 600+ storage need
If u buy without checking description & your account level are low then you Won't able to get refund. And if you want for coins then you need to pay once more time.