Son is having problems with his wifes 16 year old kid. They had a trip to Florida, kid is part of a divorce seeing dad got him. Kid was to stay with dad and work. He unlocked a basement escape window and after work told his dad and her dad they were staying with a friend, girl to girl boy to boy. They relocked the window but went out the front door the next morning and son saw them on door bell cam. son now wants to put some small personal cameras in basement, hall ways, stairways, and the kids bedroom door. Need some recommendations on small not noticeable cameras he can put up. He is also checking with alarm systems to see what it will cost to alarm the whole house, about 4000 sq ft. He wants the cameras not with the alarm system.