outdoor aviary

I'm planning on building an outdoor aviary and need some help with the material. I've been researching online but there seems to be some conflicting information. I know everyone says that stainless steel is the best option. Obviously, it is expensive, but how fast does it rust? I read a post...

I'm thinking of building an outdoor aviary with plants and maybe a shallow water feature (filtered, not deep enough to drown, parrot safe). It would be approximately 24×10ft×10ft(unsure about height) and I'm going to choose safe plants/shrubs, of course. There are going to be multiple feeding...