dose anyone know how or even if a budget airline would work in game i assume that you would run an all high density econo seat fleet with just one fleet type and cut the price but by how much and what do you do with staff and markiting
Sure you can try.
But budget/low-cost airlines do not work in AWS.
generally, low prices are a bad idea. The way the game is balanced(for preventing big boys to bully smaller fishes too hard), lowering prices lowers your income more than competition's.