Hello,
I'd say this an interesting and easy one.
I am digital sculptor, character designer and animator.
I can do it in a day ( I sculpt in zBrush) and upload file ready for 3d printing.
If You decide to work with me, I'll need 2 photos of You. Front and profile, with dimensions, just be sure everything is in proportion.
No need for milestone payments. When it's done, You pay :)
If You have any questions, feel free to ask.
All the best,
Djordje