Design a single page poster - A0 Size - Budget 20 $

I am looking to design a single page poster in A0 size, with a budget of 20$ AUD. I am seeking a minimalist design, using neutral shades of color. Additionally, I have a specific message/theme for the poster which I would like to be included in the design. If you think you are up for this design task, please contact me for more information.

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