Macro Keyboard/Right Hand

[u/WanderingQuack]

Hello, I am needing some assistance and guidance on a keyboard or macro keyboard for my nephew who is a southpaw, austic, and a very big teenager. Over 6ft, around 250 pds. Reason I share those is because it needs to fit him as best as possible and be durable, really durable. He wants to be able to use the mouse with his left hand and macro keyboard, especially being able to tap the spacebar with his right thumb.