Dear Sir,
I have seen your job description very well and realized your problem. I can solve this problem properly. I do not believe in words, believe in work. I do all the work honestly. There will be no hesitation in your pay with me, after you see my work, you pay the fee. I am grateful to you that you have given me the job. Wait for your message.
Thank you very much, for your valuable time, to read it through my proposal.
Mike