In AZ, we only have 2 types of homes....those that have had termites, and those that will. We don't do tenting like they do in California, but the companies out here drill sub-terranean holes all around the perimeter of the property. If there is no flooring, or it's easy to pull up, they will even drill on the inside perimeter. Since subterranean termites always go back into the ground every 24-48 hours to get back to their "home", they will be killed once they make their return.
The termite treatment company will issue a warranty, so if they return within a given period, they will come back out and spot treat or do full treatments. You can usually renew the warranty for a reasonable fee annually.
My recommendation would be to call the termite company and ask for an estimate for treatment. Get a figure before bailing. Sometimes it isn't that bad, and most of the time, you can get the Seller to pay for it since it is their property, and now that termites have been disclosed, they would have to disclose it to any new Buyer anyway.