Sounds like the trip is funded through raised donations
http://www.heartforafrica.org/faq.htm
I also need to do some research to see if the hospital I work for has any kind of program or financing they provide for this sort of thing.
That would be great if your sister could provide me with any information.
These types of trips really seem to be growing in popularity as reported by a recent article I read in the Wall street Journal. There are a growing number of people seeking trips/vacations helping these 3rd world countries from teaching children English to putting in a water line. From the exterior it sounds like a shitty 'vacation', but in the end so very rewarding.
I hear tribes women love yogurt faces too.