Rock on aliens! Here is another example of how a sketch would look once redrawn in the vector format. The artist used halftones(gradients) to give depth to some of the shaded areas. The finished result is a cleaned up and more professional looking version of the original drawning.
If you need something with about as much detail vectorized, you should always get a quote and opinion first before proceeding.
You can upload a quote for a speedy and efficient process here: Here (no account required).