only need one 2 star boar to make news ones. So after your first 2 star you should have bred it with any other variation. chances of 2 star offspring is 50%. So at most should have been maybe 30-90 minutes to get to two 2 star pigs.

Then you can just build a roof over them, problem solved, also don't AFK at your base. Use sneak and AFK somewhere else.