PP,
This is a difficult market to enter.
Firstly your butcher will have an existing relationship with one or more suppliers. If you are only occasionally selling to him, he will need to upset his existing relationship to buy from you. eg He buys 2 pigs a week from Fred blogs wholesalers, but this week you want him to buy two from you, and then his wholesaler will have to find another outlet for the two he has, and may not be so keen to supply your butcher next time, leaving your butcher short as the wholesaler has sold them to a new customer.
Many butchers will have contracts to buy xx pigs per week from their wholesaler, so cannot just buy from you this week.
Secondly if you buy say 8 pigs to finish off, and the butcher wants two a week, then when they are ready, you will kill two a week for 4 weeks, meaning that you are feeding 6 longer than needed, and 2 of them for a month longer than needed, eating in to profit.
Again say if you buy say 8 pigs to finish off, and the butcher wants two a week, the difference in the first to the last in terms of size would be significant, and if your butcher wants say 60kg pigs, then only one pair over 4 weeks are likely to meet his requirements, so most of what you supply would be over or under target.
Butchers will want to buy on quality, and your butcher doesn't know you from Adam, and you have no track record. If he agrees to buy he may end up with something that has loads of fat, is too big, too small, wrong shape etc. Therefore he is likely to be very wary.
Given all the above, if you do interest a butcher, he is not likely to pay much per KG for them, and you may well end up making a loss.
Finally you have the choice – do you approach a butcher now to ensure an end market, but are selling something that won’t be ready for 4 months, with the risk that he will change his mind between now and then. Or do you finish some pigs and then try and find a butcher who wants them, potentially being left with pigs that no-one wants.
OK, so that’s all the bad news, but several on this and other forums do sell occasional pigs to butchers, so by all means try, but go into this with your eyes wide open.
I suspect that you would make little in the way of profit (the money’s in selling pork direct to customers not pigs to butchers), but could be fun to see if you can make it work.
Either way, good luck and don’t shoot the messenger !