It would mean a heck of a lot of mince. Why not sell sausages to your customers, therefore getting a mark up on the product.
Also if they are big the hams will be superb, make at least one ham, (although once you have tried one you will probably want to make 4). If the legs are too fatty the butcher can remove the skin, cut off some of the fat and replace the skin. The bellies at this time of year will make the best ever spare ribs or cut into slabs and barbeque. (Mouth watering at the thought).
Dont waste the loins, turn them into the best bacon you will ever eat. If you feel they are too fatty, have them skinned and ask for some of the fat to be cut off.
Lastly keep some mince for yourselves, its amazingly versatile and so tasty.
Hope all goes well on slaughter day. Would love to hear what you eventually decide.