I'll add to the stock fence side of the fence don't forget you will also need a gate well maybe that is just me
As to costings I think and these are rough
Pound a meter for stock fencing plus posts at 6 pound every 3 meters, I use gripple to strain and connect it's about 90ish pounds for a starter pack. Gripple is expensive but when i'm fencing at 5am so I can get out the door and do a proper job it makes sense to me.
Fisher Nose drinker is about 20 quid if you have mains it's basically a mini trough you can do cheaper (it's called a bucket) more expensive if you want.. Plus a bit of concrete to go underneath.
I use cast Mexican hats for feed I had loads when did pigs and I'm to tight to buy anything else.
I then had electric fencing running around the inside which cost about 3 hundred I did add a solar panel to it though.. Sun light is free

and batteries are expensive and heavy and leisure batteries even more expensive when they get pinched so the panel can get bolted down.
A ark ... No floor second hand cost me a ton
Then 3 note books for birth deaths sales and who got off with who / medicine / And feed record.
Slappers are quite expensive not sure what they run to now
I use an auto injector for vaccinations but that price 222 is offset by cattle if just fattened you won't need to worry so much just rotate the land
Other costs BPA and perhaps your pedigree pig choice gang but those depend on which pig breed you want and again for fatteners not necessary.
Final cost is time to care for your pigs and having all your friends come around and have to say explain looking after the pigs to them
Fleabay/ preloved throw up items from time to time but have a drive around local farms ( perhaps not right now it's a late harvest) and you might pick up second hand items cheaper