With only 3 birds, would a tractor work? I'm thinking of, during the day, they stay in a chicken tractor and, during the night, in a secure coop. Could you put the coop you bought in a shed or garage? Since you were there during the day at the burned place, will you still be there during the day and the temporary place? With 3, you could almost put them in a carrier and take them back and forth to a tractor-type setting for ranging during the day and make Fort Knox out of the coop.