I have friends who live in the same apartment complex as I do and we would like to run a network between us. I don't mind spending some money (up to $100 max) as long as I'm sure it will work. Below is an ariel picture of our complex. I live at the red dot in the middle bottom apartment. I have a patio that faces away from street on the side of building that the dot is on. My friends live at the green dot in the end top (second floor) apartment. They have a balcony that faces the side of the bulding that the dot is on. All the buldings are the same height. I'm not sure of distances but the link to Terra Server provided below should give you an idea. Is this possible?
This is a link to my neighborhood on Terra Server.