My son is making an acrylic pen & pencil set for his coach and we would like to get them engraved with the basketball league logo & the coach's name.

I have a couple of questions. At what point in making the pens is it best to have them engraved? I would presume before they are assembled.

How how much should I expect to pay for this? Then kits are the Woodcraft Wallstreet II kits.

Thanks
Craig