Two things.
When I got my wife a MacBook last year that has the single USB C port I bought a similar gizmo. Damn thing gets hotter than hell. So I dumped it and got a Satechi Multi-Port adaptor that's a MUCH better solution. So do your research.
Second thing: I get that for many, cost is a key factor. I'm very sympathetic to that. But as you move on - the "grunt for dollars" considerations seem more and more to me as an artifact of the long gone era when ONLY the very best computing boxes could stand a chance of handling video streams efficiently. Now they ALL can. Desktops and laptops alike.
Sure, you should spend frugally. But you should invest - commensurate with what you expect as a return.
I want three things from my edit rig.
A - get out of my way and let me get my work done.
B - let me use the software that I feel makes me a faster and more efficient editor
and C - If something goes wrong — let me make things right FAST, so client satisfaction isn't jeopardized.
Port and/or Dongle issues appear on this list exactly NOWHERE.
IMO it's emotional comfort misdirection masquerading as a serious issue - largely promoted by people with too much fear of "choosing wrong" in their hearts and too much time on their hands.
FCP X on a MacBook Pro - A is CHECK - B is CHECK - C is ALSO a big fat CHECK.
Result:
Maximum personal comfort. Done.
YMMV.
Creator of XinTwo -
http://www.xintwo.com
The shortest path to FCP X mastery.