Is it advisable to go for al 3 nights? Will they sing different songs on different days?
I doubt the set list will be exactly the same each night... that's just my own speculation though.
And if it were me and I were already spending $2000 to see ONE night, I'd try to see all three. If you figure it would be, what, maybe $300 (?) for hotel room + ticket for nights 2 and 3, then to me if you're already spending $2000 for just one concert, you may as well spend $2600 for three. But that's purely my opinion and it all depends on your budget and how badly you want to see the other nights.