How to make clients come to you?

I developed a short screencast on photo album in Rails. Someone from New York saw my screencast. He paid me $3000 for two days work to develop a child adoption site. I created a frame for the client that required:

• No resume.
• No reference check.
• No criminal background check.
• No legally permitted to work check.
• No open source project contributor requirement.
• No degree requirement.
• No BS computer science questions.
• No Ninja, Super Man or Spider Man required.
• No onsite work only requirement.
• No standups.
• No meetings.
• No status reports.
• No Skype interviews.
• No face-to-face interviews.
• No negotiation.
• No confidentiality agreement.

By recording a screencast I proved that I have the skills to produce the outcome he wanted. The screencast built my credibility and created the trust. He paid 50% before I started the project and the rest upon completion.