H2B is a remote option as your friend has to prove that noone authorized to work in the US can fill the position and that the work will be under 12 months/year plus limited to a three year time line. If there are special circumstances this may work.
You will need to figure out what to do with the older child. 21 is the cut off to tag along on a parent's visa. Education is probably the only route and the child has to qualify for admission at a US institution and get approved for the respective visa.
You will need to figure out what to do with the older child. 21 is the cut off to tag along on a parent's visa. Education is probably the only route and the child has to qualify for admission at a US institution and get approved for the respective visa.