I don’t take my snakes to the vet for a checkup, just if there is an issue. As for quarantine, as mentioned this is to protect the rest of your collection. That said, even if this is your only snake, it’s best to keep new purchases on white paper towels for at least a month or so to spot mites or issues with their stool. For my quarantine tubs, they stay on paper towels for the duration of quarantine.