Earlier quoted context omitted.
It's curious there's no video, since they're already crop-dusting. Even searching on the internet didn't turn up anything. BTW "piker" is slang for giving up, not the best startup connotation! (though mightn't be widespread)
Parse that again - I'm not sure that they are actually cropdusting in New Zealand. I have not heard of anything here in NZ (where we don't call it cropdusting anyway), but who knows.
It depends on what "developed" means, but the next sentence seems to say they are currently earning $600 ph from it. I suppose it could be parsed to mean that a hypothetical "business" earns that.