WOW! I just looked it up, and they have only excavated only 5%! Sadly, if they are doing only 5% every 30 years, I don’t expect to be around once they’ve excavated 100%.
You would certainly have to live a long time because they are intentionally not going to dig the whole site. They are aware of the importance of the site and know that todays tools and techniques arent sufficient and as such want to leave it for future generations more capable.