As well as what people said above re. choice of joints and chops v sausages, it's also important to remember that everyone has a different idea about the quality and composition of sausages. I insist that mine are 90% meat - and that means no sinewy stuff, eyelids, and not TOO much fat, etc. Only the meat I would want to eat myself goes into my sausages and burgers.
Making sausages is a great way of stretching meat - but if you're in the pig-rearing game on a small scale and all you want is great produce, I'd say go for quality rather than quantity.