The question: 
I am looking to attach a second external monitor and the HDMI port is already in use. What’s the least resource intensive way to add an additional monitor?

Details:

12th Gen Intel(R) Core(TM) i7-12800H   2.40 GHz

NVIDIA GeForce RTX 3080 TI

32.0 GB (31.7 GB usable)

Razer Blade Advanced 15 (2022)

My laptop has two USB-C ports, three USB-A ports, a power port, and an HDMI port. I don’t use this laptop for gaming but for video and photo editing. I currently have a USB-A port in use for external drives (via a USB-A hub), another USB-A port in use for video/photo editor controls, and the final USB-A in use with a mouse.  One USB-C I use for an M.2 drive for active editing, and the other I use for CF-Express card reader. The HDMI port is used for a monitor I use for color-grading. I would like to attach another monitor for additional color-grading controls or to run supportive applications. It doesn’t need to be a fast millisecond monitor or one that can handle Adobe color space, but I would prefer a 4k one. It will only be there as a supportive monitor, not one that makes money.

Advice is appreciated!