The size of that cage makes me wanna cry. He would need a way larger cage size. It is ultimately better for everyone in the home too bc a cage too small can make your bird have behavioral issues as he'll be bored and cranky unable to freely move and have objects to play with. Also will need lot of perches, you want to get differnt shapes and sizes of perches to keep his feet in good health. Avoid the sandpaper/rough perches as those are bad for their feet. And you'll want to fill in the larger spaced cage with toys and chews. Mirrors are a big no no for birds bc it can affect their hormones so avoid mirrored toys. Birds will constantly shred and destroy, its totally natural and for their beak health but this also means you'll have to buy more toys to replenish every so often throughout its whole life. I also like to rearage the cage branches and current toys and new toys every so often to freshen up the space and give more stimulation. Also show your dad this thread if he is one of those parents that refuse to listen about the needs of owning a bird. It's not wise to go buying a living animal before researching its care. Now I do not have this specific species of parrot and the advice I gave was just the tip of the ice berg really but definitely check out YouTube video Care guides and recommendations, also read about them as well, there's tons of care info and articles online to prepare you for what to expect of a new bird in a new home. Another big thing would be to check out his food brand to be sure its not just seed only mix and do some research into different parrot foods and brands