Eminem used to be more business fueled because when he first started out in the game he was poor and at that time cared about getting money more for his own family and especially his daughter, but now he that he has the wealth he's still doing music and hes doing it more for the art then the money because he enjoys doing it and he isn't worrying about money so much anymore.
I think money is a big influence behind it but I also think if you have a passion for it, it can also play a big role in creating a work of art. So I think if you enjoy getting paid to do what you love it can be a big work of art. So when he was poor at the time he got into the industry and he already had a job so he can provide for his family, but now he does it just for the fun of it.
How Marshall Mathers got into the industry was that Dr Dre had ended up finding one of Eminems old Eps on the floor of his office and he ended up listening to it and wanting to find Eminem. Once they were able to get a hold of each other, Eminem flew down to L.A for a couple of months and they started working on the Slim Shady Lp and after Eminem's first music video ("My Name Is") he ended up going mainstream.
