Although a hub is useful, it's worth dedicating one of your USB-C / thunderbolt ports to running your external screen, especially if you can't afford a good hub

Although a hub is useful, it's worth dedicating one of your USB-C / thunderbolt ports to running your external screen, especially if you can't afford a good hub at the moment. I use a DP to USB-C cable on my MacBook Pro. As the article points out, it's not worth bothering with HDMI as you'll easily end up with 30Hz at 4k. 30Hz is absolutely unbearable, and I think most developers buying a new screen now will invest in a good 4K monitor. Note about my setup: I then run 3008x1692 (2560x1440 is also good) scaled resolution on my 4K monitor as the full 3840x2160 resolution will make everything extremely small. Everything is crisp and running at a beautiful 60Hz.