I watched this video & most of what was said i agree with.
The old debate about grit or gravel for Budgies has come up here too. They are for it. I have read that wild Budgies have been found eating grit like materials. A lot of people say as they husk their seeds they don't need grit. [maybe they forget to husk the odd one?]
The main reason i'm linking you to this video is the nice housing solution, great swings, & the rehome issues & for those interested in putting males with females.
Nice Budgies too - wish there had been sound - that would have been intense considering the numbers.
YouTube - How we keep our budgies
hope you like it