What are Saudi princes like?

I have two language students coming to stay in my house for the summer and I've just been informed by the language school that one of them is a member of the Saudi royal family. The language school are not paying me very much to be a host family and my plans for cheap and cheerful spaghetti, pizzas and salads have gone up in smoke somewhat! Now I know that they have thousands of princes in Saudi Arabia but does anyone know about them? He is just a teenager, but I have to say that I'm a little apprehensive about how he may act.