Our pigs have a Pighouse (recycled wooden playhouse) so they have their sleeping/haybox ( one of those garden trunks with two 'doors' cut out) a trug filled with hay (again with a door cut)
a tube (plastic bendy)- even our lardy sow can fit in that and turn round <<impressed>> they have HopInn tunnels for outside but I need to repair the edges
when they come in at night (we'll start at Guy Fawkes) they have a 4'2' cage (solid plastic base/wire lid) and I have some grids to make a run. Last year they didn't use the run much so it's easier all round to give them the cage stuffed with hay . They go out to their Pighouse in the daytime.
Anything they can eat/shred/hide in basically ticks the boxes
Oh yes, Primark bag (without handles- and you don't need to pay the pesky 5p )
Though we have ructions where the sows go into the bag and the boar (who is lovely but not exactly the sharpest knife in the drawer) sits on the edge and closes it. The sows go ballistic , he;s got his "What's occurring" face on.................
They could eat their way out of a paper bag even if they couldn't punch their way out