This is a great tour.
We went on vacation to Scottsdale for a week at a Timeshare Exchange. A couple of days of golf and then some day trips in the area, a PXG fitting and the factory tour. The tour was tremendous. I signed up our group of six about 2 months in advance on the Ping Website. I think they actually call it the Campus Tour. It appears that they only take 8 people each day and they offer it Monday thru Thursday. Things may have changed so it's important to check on the schedule.
Even though I was the only Golf Geek in our group, the whole group acknowledged that the Tour was the highlight of our trip. I can't wait to go back!
As to budget for the trip, hard to comment. Depends on where you are coming from and I'm sure the time of the year has a major impact.