how do you get rid of roaches?

My neighbors are filthy, their home is full of roaches. Because my neighborhood, the houses are right on eachother. Now the roaches from her house have migrated over. I don't have the money to move, and I know roaches are unsafe for children. Please, any natural remedies that work to get rid of them!? She can have all them back, I'm just disgusted by how many she has.