You need to find a rack which the bars are small enough that they can’t get their heads in. As you are in the US, I’ll leave it to US based members to suggest one, no point in me suggesting one which you can’t get in over there!
When it comes to food bowls, water bottles, hay racks/trays/piles - you need to have one for each piggy. They may end up wanting to share, but the last thing you want is to create arguments between piggies over items. This is particularly important for any teenage boars - the rule with boars is that you don’t ever give them a reason to bicker! You may find that your piggies when you get them, won’t like hay racks and may prefer piles which they can jump in and eat from!
When it comes to beds and hidey huts, I always go with at least one per pig. This stops any piggy being able to prevent others when having a bed. My two boys have 7 such items between them spread all around their enclosure