it's been very special to read this thread.  aoxa, you are lucky to have such good friends.  your memorial garden is a good idea.  i too have a memorial garden.
your barn plans are just gorgeous.  won't that be a great day when you can walk in there & it's all done and the possibilities are before you.  i know you won't ever forget, but your new babies will bring you joy.
i saw you mentioned dutch doors.  i have dutch doors on both ends.  it's one of the best features.  i also have made screen doors for the top sections w/wood frame & hardware cloth so i can have extra ventilation on those hot summer nights without worrying about predators.
 
best of all things with your new barn and babies.