Before you come to the USA, you need to sign up at Joann.com They will send you coupons.. The coupons are dated, so hopefully timing will be on your side, and there will be some coupons issued just before you come, or while you are here. Will you be bringing your computer? If so, then you can download your coupon onto a memory stick and take it to any pharmacy such as Walgreens, or CVS and print it for 30 cents. Also, the rulers go on sale from time to time and you can check that online.
Also, rulers are available at some other places. I was at AC Moore last week and I saw some rulers there. They have coupons that come out every Sunday by email. Sometimes 50% and sometimes 40% off of one item only. But if you and your hubby go to the store, you can each use a coupon.
You can do lots of research online before you come. And being on this board will help you lots too.
How long will you be in the USA?