Huge amount of variance here.
It depends on the starting stack, blind structure and when the color up is.
It would typically end when there's about 50 big blinds at the table, but the amount of chips depends on the structure.
I had a 12 person T10,000 last tuesday and it ended when the blinds were at 2000/4000, but only for a couple hands. Since there were only $1000 chips at the table after the color up, there were 120, $1000 chips on the table.
If someone at the tourney complained that there were too many chips, you should ban them.

It's blasphomy.