Grayscaling//Basing

Today I've just been staring at this old line piece I did based on a photo I took. I've been really wanting to continue it. But I cannot base it // Greyscale it because I'll butcher it. So I'm putting feelers out to see if anyone would be interested in doing so? And how much roughly it'd cost.

Link to it saved in a weird format

I know it has a long way to go, but I have the original photo if it helps. I'm open to any changes needed to make this piece successful. To have my own lineart used for something instead of sitting and rotting like all the others.