For NAS getting something used from someone upgrading to something bigger on eBay is often a good route. Just be absolutely sure the model being sold meets your needs. Do you plan to run software on it for instance? Check what it can comfortably run first.
For drives. Server part deals always has good prices. I’d recommend only buying the ones with 1-3 year seller or manufacturer warranty though which is most of them. Easily half the price per TB you find most places. $150 gets you 14TB there.
Full disc rips perhaps. Unfortunately many remux don’t bother to pass through such tracks (though some do). Some groups like qxr often but not always may include them when available. Thing is they only really exist for movies released in the past perhaps 15 years from what I’ve seen.