That one in the picture is gorgeous!
But having some time before the move, you can look around and find others that might take your fancy too.
I suggest that you have a look on Pinterest, there are entire boards dedicated to bird aviaries and flights, and some come with detailed instructions, list of materials etc.
Sometimes I go there and look at those boards just to dream how much I'd love to have a REALLY HUGE flight for my birds!
The one outside the window I have planned can't be built now: we bought the material for a mini-greenhouse and until that's completed I refuse to start another project!
Stephanie, how good are you at DIY? Do you enjoy it? What about your parents? You'd cut the cost by half, maybe more, if you'll manage to find one you can actually build yourself. And if you need just to pay for the materials the rest of the money can go into making it bigger
