Hi to the ES community,

I am currently freelancing as a writer, i previously worked for assignment agents, and i am having an issue of creating a network of my own clients.
Do you guys have any suggestions as to how i can increase my client based, and what are the best steps towards a prominent career in writing. At the moment i have managed to write to PHD level within the business and engineering subject areas. The outcome was successful. I though my "happy" clients would recommend my services to others, but it seems to take a long time. Should I try to pay for advertising or maybe offer extremely good deals or "free trials" to gain trust and confidence among the students?
How long, do you think, is it going to take before I build steady client-base without the need of working with some shady writing agencies?
Thank you
Chloe C