Get that rough image up in your modeling window. Either cut it up first in Photoshop for the various views or slap it in there the way it is.
Then, without worrying about clean geometry, quick-model a The shapes, doesn’t have to be nurbed, just for the shape. Once you’ve got a form you’re happy with from one view (the side) then push things in the other window. Slice 'em, whatever.
Tweak holding the ctl button, so they only slide on the one axis and make your volume up to snuff.
Then use this object in a background layer to model with regard to clean geometry.









and it fits to your style 






:airguitar