Business work T-shirt print design for clinet

For my business I do freelance design work for people, I was recently asked by someone to design a few T-shirt prints, I am charging £50 per design because the client has made me their official designer which means that they want me to design regularly for their clothing brand, this person will be paying me weekly based on the amount of designs I do a week. This person is based in leeds and is starting out, I have been given the expressive freedom to do as I wish so he is open to any designs I create. Everyone who follows me including other animators and illustrators really like my work, I am always getting various complements and many likes from people around the world, I get regular shout outs about my account and many people are very attracted to my work because they think my style is unique. Every day doing what I love excites me because my drawing style is developing into a form of identification of my own and I am really happy with it because my drawings in the past were very substandard and I did not like my drawing style because I believed that I could do a lot better.