It seems like your wife has a good thing going...make sure that your product can live up to her levels. If you aren't adding positives to her venture, stay away from it...for your marriage and your sanity
.
As far as the pork goes...a couple of lessons:
1. Pork can go up and down and has been as high as 1.69 a pound here. You also have 40% shrinkage, rubs, injections, fuel (to heat), sauce (maybe), time, cleaning and packing supplies.
2. Once you name a price, it is hard to be anything other than that price. If you say you are $5 a pound...it would be hard for me to pay $8 a pound tomorrow. Most people understand that it takes a long time to cook pork and even then you can end up with average pork. I say don't go a penny under $7 a lb so that you can use all the ingredients that you want to use.
I would also look at selling rubs and sauces in this equation...its more gourmet than frozen pulled pork. Just some thoughts to consider.
Good luck and make some money!!!