Bunks take up far less space than 2 single beds, and kids are much happier if you put 2 in a bedroom using bunks than if you put 2 kids in a bedroom with less room because of the 2 beds and they sleep in single beds. Certain things have to be kept in mind about bunk beds, like make sure that the top bunk has a railing right on the top. Best bunk bed it is very important that the railing is done around the entire top of the bunk or at least on the open sides. If there are 2 or 3 open sides then railing has to be done according to that. The railing has to be solid and fixed properly so that it should not be removed by the kids. It can be dangerous for the kids, so see to it that there are no gaps between the top of the mattress and the bottom of the railing, because the kids can fall through the gaps.
Jan 31