I use 3 screens with my trusty Dell XPS. I am starting to edit 4k video footage and need a PC that can do this, would it be expensive to build or hard? I'd need 32GB ram at least and a solid state drive and to be able to run 3 ultra HD screens.
TBH if you need to ask then I would suggest that you shouldn't be attempting a first time build on a 4K video editing machine given the costs involved. As the previous answerers (in your other post) have said get a system builder to custom build you a machine and be guided by their advice. For a small builders premium let them take the hassle and provide the warranty