To Sunny Donny.Hi, from a refugee Doncastrian. I agree pigs are the easiest, pay a bit more and get them from a good breeder so they have been vaccinated etc. I got mine in the end of April and sent them off at the end of September, before it gets muddy. Make sure they have plenty of water, a bale of straw to sleep in and pick over and shop around for food, and start planning now where you are going to send them.
If its a new plot I would put their pen on the worst part so they clear it for you but close enough to the water. To start off with I would use pallets for fencing as you might get them free with a strand of electric to keep them off them but it depends how secure you plot is.
There are lots of web sites for help, and this forum has lots of knowledgeable people on it, with practicable experience. Enjoy.