I've gotten into data hoarding for the same reason. Google photos, youtube, icloud; storing your content on your own hardware is always best for critical features like predictability and access (I don't even want to imagine managing multiple TB through my consumer internet connection). Cloud is great for convenience and redundancy but I consider those secondary features to data preservation.

Follow-up: any recommendations for a beginner NAS? I'd love something cheap and simple; a 2-4 drive system with plug and play functionality would be awesome. I can live without streaming 4k videos or top-of-the-line features like that, though streaming 1080p would be nice.