It might help, but I doubt it'll be 5k worth of help. Shadowing a foreign doctor doesn't tell you much about medicine in the US and some think these trips are more about the person going than the people being helped. That being said, I have classmates who went on them, probably listed them on AMCAS, and they're in med school so it's not like they cant help. I think the big thing is that they ultimately can't replace shadowing or volunteering in the US. For two weeks, you could shadow a physician stateside and put that money towards something better.