In a few years I'm probably going to become a drug dealer.
What makes this is a thing that will happen to you?
I would do anything to gain a client's trust even if it meant doing something illegal.
I can understand your desire to succeed but there are better ways to go about it. It is against the law to sell drugs. You should try and have a honest business with others.
What if I hide my illegal activities behind something that is considered legal.
Selling drugs is illegal and hiding it behind something that appears to be legal is still wrong and could potentially get you into a lot of trouble. There are ways to achieve success that are not immoral and illegal. You should have limits as to how far you will go to please your clients.