Would 'I have a big pocket' be 'Saya punya kantong besar'?
Yes. Perfect
Would kantongku besar be ok? If not why?
It accepted it when I tried
That's exactly what I put just now and it was accepted.
I keep getting "Kantong saya besar" wrong because in English that translates to "Pocket my big" instead of "my pocket is big" so confusing :(
Word order is different in Indonesian than English so what translates doesn't always end up in the same word for word order
Does this mean 'I have money to spend' as it does in english as a kind of idiom?
Doraemon? :O
Saku is more common