Home office
I work from home full time and am lucky enough to have a tiny 3rd bedroom that makes a decent home office. I have set myself up with such a good work environment that when I do go to the office it feels cramped and lo-tech with smaller desks and tiny 26" monitors <LOL>. I have a 180cm x 70cm desk that is height adjustable, two 32" curved 1920x1080 monitors, a good keyboard and mouse, and a USB switch for the keyboard, mouse, and video camera. For work I have a high-ish spec Dell laptop and a USB-C docking station (both supplied by the company) which is more than adequate for what I do. The work laptop needs to be portable for the occasional visits to the office and to customer sites so a desktop won't work for me there.
For home use I have an old-ish i7-4790 with 16GB RAM, and a GeForce GTX960 with 4GB VRAM, with a big SSD, a big HDD, and a good 5.1 speaker system. The home setup suffices for the games that I play (Fallout4, GTA5, Outer Limits, Skyrim, Half-Life, etc.) and anything else I need to do on a PC. I have yet to encounter anything that would make me want to replace it.
Both PCs use the same monitors, keyboard, mouse, and camera. All the cabling goes down the back of the desk where it is clipped to the underside of the desk with stick on cable clips. I also have an "ergonomic" office chair. It's tidy-ish but highly functional. Total cost outside of the desktop PC, laptop, and speaker system is about £1250 but given that I spend 50+ hours per week here, worth every penny and then some.