Home for a family of 3

I'm raising money to give a family in Mexico a home with better living conditions. The home is for a 70year old Grandmother who is sick ,her son who is autistic and a granddaughter of 12 who was abandon by her parents. This money will help give them a more hospitable home. They current live in a small home made of recycle pieces of wood, plastic covers and old cardboard boxes to cover the gaps between the wood.