My setup after working from home for 3 years:

OFFICE

Dedicated bedroom converted to office. Couple of shelves, my desk and a bed for the dog are the only furniture in it. I have a window next to my desk that faces our street and front door so I can tell if the knock at the door is something I actually have to answer or just a package drop-off I can ignore.

DESK SETUP

My desk is a hand crank standing desk from Multi Table (https://www.multitable.com/product/multitable-manual-mod-tab...). It’s the smallest size and it’s perfect for me - just enough room for the essentials but not so much that the Law of Flat Surfaces kicks in and it gets cluttered with junk.

CHAIR

Steelcase Leap. I can’t recommend this chair enough. Chairs are a very personal thing so you have to find what works for you but wow does it make a difference when you find the right fit. Yes, it’s expensive but it should last quite a while and even if you’re part standing you’ll still spend lots of time in your chair. It’s worth every penny.

MONITOR / COMPUTER / ETC

2016 era MBP (no touchbar or “new keyboard” which I purposely avoided even through they were available when I bought it).

Monitor is Dell UltraSharp 27” like https://www.amazon.com/Dell-UltraSharp-27-Inch-LED-Lit-Monit... mounted on an Amazon basics arm for ultimate flexibility and to free up desk space the monitor platform would otherwise occupy: https://www.amazon.com/AmazonBasics-Premium-Single-Monitor-S...

I’d probably get a higher resolution monitor if buying this all today but I have 0 complaints about my current one.

My MBP sits on a simple laptop stand to bring it’s monitor up to similar height as the main monitor and it’s my “2nd” screen.

Keyboard is Kinesis Freestyle2 Blue to help mitigate tendonitis I developed in my wrist after using an Apple trackpad for too long (side note: if there’s ever a class action around these I’m 100% in - they can be absolutely evil in terms of ergonomics).

Mouse is a Kensington trackball (https://www.amazon.com/Kensington-Orbit-Trackball-Scroll-K72...), again, for ergonomic reasons.

Headset: Plantronics C720 bluetooth I can use for calls via the computer or my phone and the quality is excellent. I can’t even stand using my actual phone for audio anymore when I’m away from my desk.

For mats I have two standing mats folded over that I stand on and I try to always wear some sort of supportive shoes (or sandals) when standing. I typically stand all morning until lunch and then sit for the afternoon.

There’s a FitDesk under desk elliptical under the desk which I used for about a month but now I broke the habit and it’s just taking up space.

NETWORK

Comcast (my only choice) residential internet - ~250mbps down and ~10 up. They refuse to give me more up no matter what plan I ask for but other than that it’s pretty good. Sometimes it goes out which leads me to my backup kit which is a regular iPad (with cellular) with a Logi keyboard case on it for easier typing. In the event of a critical event and my internet going out at the same time (has happened once in 3 years) I can buy an on-demand data package and be online in a few minutes. I have to take the time to make sure the iPad can do whatever things I need it to do (have some basic text editors on it along with SSH apps and updated keys, etc) but being able to just grab the iPad and go is great (also great for taking it on trips when it’s necessary for me to be available “just in case”).