UPDATE:
Well, the house is taking FOREVER to build

, but here is a picture of the sunroom space and the corner I'm planning on caging off for the aviary part. It's hard to tell in the picture, but the all-glass part of the sunroom will extend 10' past the porch overhang (which is 8') coming off the house.
After we recently had a finch loose in our current house and it kept going for the windows, I think I finally convinced my husband that it would be better to have them sectioned off in their own space instead of loose in the entire sunroom.
The corner walls are 8' x 8' so the aviary will be triangular shaped. I think I want to also cage the top at ceiling height instead of going all the way up to the vaulted part so I can have lights safely up above the cage ceiling and not accessible to the finches. The corner walls each have a window, one into the house so I can also watch them from inside, and one to the outside which is under a deep covered porch. There are also skylights above, one of which will be over the aviary part so they will get some sunshine. I've been watching where the sun is throughout the day and there will still be plenty of shaded areas for them to go if they want.
Can't wait until it gets DONE and I can start planning how I'm actually going to build this thing. Preferably I would want it to be all metal for durability and and ease of cleaning, but we'll see what we can afford since the house is costing
a lot more than expected...
I'll keep you posted with pictures as it goes along.