Can you adopt more than one child at a time?

Yes. In the majority of the cases it pertains to siblings. It is preferable that children of the same family remain together. Therefore the court gives special attention to those type of adoptions.

It really depends on whether or not it is determined that you can financially support more than one.

In the case of intercountry adoptions, the government of the child's country makes the rules. For example, China does not allow the adoption of more than one child at a time except in the case of twins - which are rare. Many countries seem to go with the one child at a time policy.