I too would get all the same sex and preferably boars the first time around.
Apologies if any of this which follows is stuff you already know (granny, egss etc) but they were the things I wanted to know when I started a couple of years ago...also with weaners.
I use battery powered electric fencing and use the Gemini battery energisers - for the size of paddock you have you can use any of the standard ones - you'll see 40/80/120J ones. I buy off countrystoredirect online or electricfencing.co.uk although you'll find offers on other sites every now and then. They're not cheap but they last and they go from flashing green to red when the battery is low and needs charging. I charge using a standard 12v Halfords battery charger and use standard 12v batteries which on larger paddocks than yours last a good few weeks. Beware the batteries can be very heavy so check that when you're buying. The online stores also do electric fencing wire/tape, gate handles, earth rods and connectors and I use the very bog standard electric fencing plastic posts - best price I have found is countrywide (stores/online). I use the 10mm/12mm white fence tape as it's easier for the pigs to see but you would be amazed how quickly they get used to it. Just be aware of getting the height right which will depend on how big they are when they arrive. And clip any vegetation which is touching the tape (the odd blade of grass doesn't make a difference but you'll hear it clicking by the place there is vegetation if it's causing an issue. I tend for all size pigs to use two strands of tape. Oh and remember to clip the two lines together (I do it with the red fence connector) so that the charge carries to both of them - I spent a good few hours trying to figure out why I wasn't seeing them getting shocked on the one line before I worked it out.
Have fun - they're seriously addictive!
Martha R