If you said your nape and sides are fine, just shave the area that you said you had 30% density (balding area), and integrate a topper (partial) there.

You can get a system on any condition, they can replicate your remaining hair so well, Just ask for a little of grey and also attach a sample of your natural growing hair so they can match it better.

Stubble grow as far as I know is not a concern, they only thing you have to take into account is to trim it with clippers, and not completely `shave` it, since most guys get irritation from this.

Good luck,