since you have posted in the pig section i am assuming you are referring to pigs
a meat processing plant is not cheap to establish usually in the region of £20-£30 thousand then all your compliance with environmental health issues
the area you are in is there another plant like what you are proposing already established and is it viable
it is not just the initial cost of set up there is the daily running costs and changes to the rates on these buildings
conservation grazing by pigs that can only take place in a woodland setting and only to fertilise the area and prevent a weed infestation
the service that you are proposing could be prohibitively expensive and further reduce the proffit margin that is there
you will have investigated all the pros and cons already and done costings at all stages of your new venture before asking on here