40TB is no issue these days (and that is just for storage, not editing), but scanning is a real PITA, and not many people are used to working with 4K that haven't had to do it for a living. Even then a lot of work I used to do was delivered at 2K because 4K is so much more unwieldy to work with.
It isn't something you can do for a bit of fun, it requires real workstations, real dedication, a real workflow and a lack of other life :)