Creation of custom halloween costumes.

I am looking for someone to create custom halloween costumes that can accommodate both children and adults and have a budget of more than $200. I need these costumes to be completed in four weeks. Creativity and attention to detail are essential for this project, as I would like the costumes to bring out the spirit of halloween and be memorable. If you are up for the challenge, please reach out and let me know your best ideas for creating these costumes.