I don't think that extruding the hairline will push you past the 3k mark, and it shouldn't be more than roughly 100 tris extra, but you might wanna consider making the transition from forehead to hair less sharp, as his hair is (is assume) pulled back into the ponytail, and then that edge you've got shouldn't be there as I see it... Considering this, it can be debated whether or not extruding, or bump-mapping for that matter, the hair is actually necessary
I'd suggest moving the edges from the extrution more into the hair so that it looks raised from the scalp, but with a smoother transition... Hope this makes sense

Also, you might wanna consider making him go see a doctor, that skintone looks kinda ill