So I want to build something sturdy to put my cages on, something like the pictures I have attached (some found on this forum). Where do you guys recommend getting the materials from?
I'd stay away from anything treated as deck wood because it contains arsenic. Any type of painted base that made in the U.S. before 1978 or made overseas might contain lead
Don't use the greenish tinted treated wood (it should also be labelled as such) or cedar. You can get nice poplar or douglas fir boards at many large hardware stores like menards and home depot or if you really want to splurge and spend money you can get hardwood boards like oak. Some places will cut it for you. Then you just have to screw it together.