That sounds like a good idea, but I know that it's really hard to get gold when you have armor to craft and other things to save up for(spent 300 gold in one day, didn't even craft anything TT-TT)
I think chibi can go for 50g adding 25g for each extra character. Then for normal drawings it can go 50 for face, 100 for waist up and 150 for full body.
Maybe I can add a bit for shading and advanced shading?
I am easily content with even little money
I can adjust the price if it doesn't seem fair.