Dry hopping for 2-3 days should be enough but 7 days won't hurt.I'd be okay with waiting for a good result. So ferment for 14 days, all the hops in at day 7, then leave for another 7 days then cold crash. Then leave it for how long before bottling would you say?
I like to get it down slowly to 0C and hold it there for at least a day or two but as its so cold it won't do any harm to hold it there longer until its convenient to package.