MB168B

If you think you need a keyboard you really need a better laptop. Bluetooth mouse with no dongle. I use an Asus M168b as a second monitor - data and power over the same USB cable. Charge cord for phone. AC and auto/air power for the laptop. I have other gear for my road gear that don't apply to most people: GPS, AIS, USB fan, USB/WiFi hard drive, USB rechargeable pen light, satellite tracker, two sets of AirPods with cords, waterproof USB endoscope that all plug into a *powered* USB hub. Adapters and inverter so I can plug into 117VAC 60 Hz, 220VAC 50 Hz, and 12VDC anywhere in the world. Definitely get a triplex power adapter for places you may have to share limited power outlets.

My experience is quite different than yours OP u/themotarfoker. I have a Lenovo T450 and an Asus MB168b. The sleeve it comes with is supposed to be a stand but didn't work well so I have a little custom stand. The display sits on top of my laptop in my laptop bag. I'm a yacht delivery skipper and my gear is subject to a lot more abuse than that of most people. No problems after six or eight years. Laptop screen and portable isn't the same as two huge monitors but it's a huge efficiency improvement over just the laptop screen.