I love guineas, I kept them as a child through my teens.
Six years ago (when DD uttered the I want a Pet dreaded phrase) we got two boars .
Since GP1/GP2 we've gone through a cycle and now have GP6/GP7/GP8.
Bad things (you'll overlook them but you need to know
)
They are completely defenceless little animals , you as the owner have to do all the planning to keep them safe.
So whether its predators, heat, cold, damp, draught, you need to protect them.
They need to eat pretty constantly (I think mine sleep but the jaws go the rest of the time)
They have quite specific health needs and can die out of the blue 
The hay gets EVERYWHERE.
They pee and pooh a lot
You get out what you put in.
Mine live in an old Playhouse, they come indoors in Winter. They like their deep hay to snuggle in and space to explore, especially if you have boars.
Sadly there are loads on sites like Gumtree where people buy them for the kids who 'outgrow' them. Or the boars squabble usually because the cage is too small . Or allergies.
My DD was fine with our first 2, allergic to GP3 and very allergic to GP6 (her soppy neutered boar. I've offered to have him but she would rather have the rash)
Our sows (all my pigs are from Rescue) don't get along with the boar.
Once we're down to a singleton, it'll live inside all the time in the lounge and I will wind up my pig keeping (the pigs are all 3yo, DD is 15.6 so she'll be off to Uni in a few years)
They are the most gentle, (I had one bitey pig) chatty, lazy, greedy, messy, unprepared to defend themselves little rodents.
And we Love 'Em 