If you buy the polos and take them to an embroiderer, they will usually tell you that they are not responsible if any become damaged. If they can get them for the same price that you can, and sometimes better, you might be better off buying them already finished. You should look for a local embroidery company so you can see an example of their work and discuss terms. There will usually be different price breaks at different volumes and stitch counts for each design. They may also have access to a better variety of garments than you will.