Highly Detailed Hand-Drawn Family Portrait

I'm looking for a highly detailed, hand-drawn grayscale portrait of my mother and her four grandkids. The setting for the photo is a studio.

Requirements:
- Ability to create a realistic, highly detailed hand-drawn portrait
- Experience with grayscale and traditional drawing techniques
- Attention to detail and capturing likenesses

Ideal Skills and Experience:
- Professional drawing or illustration experience
- Portfolio showcasing similar work
- Good communication to ensure the final piece meets expectations