If you can't get the troughs in the house then you could just go find a really big box. Like a fridge box or something around that size. Better to keep them all together since introductions will be a lot harder later. That would just make more work for you. We all have improvised when we had too. I've got to get my brooder box cleaned today and set back up because tomorrow or Friday my new set of 25 chicks should arrive. It's kinda like parenthood. Half the time you're winging it...no punn intended. All you can do is the best that you can do. Best of luck to you.