I'm sorry, but that is not a very good contract. I am a BBJ FO with a (on paper, not quite the real case atm) 30/30 rotation and making close to double of that salary, and double the per diem. I am surprised that is the best PrivatAir can do. I guess it's a sign of the sad state of aviation in Europe.
I suppose it can be good as a stepping stone and to build experience, but definitely not competitive with most BBJ jobs out there. I hope PrivatAir don't expect people to stick around under those terms.