I would suggest you start quite simply with 2 weaners to take on to pork. This way you will learn ,at very little cost,the most important thing….do you like pigs . You may presently “think” its a great idea, but in some cases reality is not quite the same.In a lot of cases it is simply the begining of”an affair” into the search for perfection.
The housing , space, costs etc of 2 pigs will not be as trying, as the paperwork and preparation for the same.
Quite the best thing to do in the coming months is to visit as many pig breeders as possible ,or pig rearers, and seek advice. Ask as simple or as stupid a question as it may seem . Be sure of one thing ,the person answering you will have asked that question at some point !