You never have a $0 advertising budget because time is money and money is time. So change your approach to how you invest in your future, and everything will change. The question I would ask you is who do you want to work with? Do you know 1-5 people who could value your work? Approach them and try a couple projects with them. Then from there build your client list and take 10% from what you make to invest in marketing for reaching more of those types of people.