You just need the TAX EXEMPT status for the year you would be buying the tractor. So, for the $5K, it can be ANYTHING farm related. That's how it was in TN, KY, IL and WI that I'm aware of. We only need $1K to show. Bummer GA is $5K.
Any livestock feed, processing, vet bills, etc. Even materials to build a tractor shed for the machine and a tiller. Just like the other posted said, KEEP all receipts. Plus photo copy them because receipts FADE to nothing due to cheap inks.
We raise just under 100 meat birds, that alone from the hatchery to the processor to the freezer gets us so close to the $1K.
Not sure about GA, but in many of the states, it's covered for even NON SALE use to reach the $1K for the family farm. Yep, regs are pain and not all the same.
Years ago, at TSC while looking at zero-turns, the sales guy said, if you pay in cash, it's only the KY sales tax and not TN. IF you pay by credit/debit, the bank will tell TN the transaction, thus needing to paying the revenooers. Long as there wasn't a VIN plate, cash was safe.