What computer for cutting 4k footage? (no color grading, no effects)

Hey guys,

I'm about to shoot my first feature film and trying to figure out post production costs. We're gonna shoot in 4k and I'm gonna cut the movie myself but that's where it ends for me, I'm gonna hire a professional editor to do color grading, effects etc. So my question is what is the most budget friendly option of a computer I can get in order to cut 4k footage and then export it for my editor to do the rest. I do not care whether it's desktop or laptop, mac or windows. I'm of course gonna edit in Premiere Pro.

This is the current computer I'm using, but it's really struggling with 4k even on short projects.

I'd appreciate any advice on this.

[Moderator note: moved to best forum]