How much will 10 migration tickets cost?

It depends how soon you want them. The first ticket you purchase each month costs $10 USD. Any other ticket within that month goes up to $100 each. This is done to discourage people from jumping state-to-state on a regular basis.

If you have zero tickets and never purchased one, and you wanted to buy all 10 today, it would cost you $910 USD. (1@$10 + 9@$100). However, if you wanted to spend the least amount possible it would take you 10 months of you buying 1 each month @ $10 ($100 total).

Most people who are more serious about the game and intend to play for a while will purchase these tickets every month even when they currently have no intent to migrate. This way when the time comes that they want to migrate they already have tickets saved up.