[nostrademons]

Definitely follow c) then.

I've been working from home for almost the past 6 years. My home is not huge - we managed to have an extra room for the 3 years between moving in with my now-wife and having a kid, but I was in a small 1BR before that and the kid consumes all available space (like literally all available space) after that. I don't have an external monitor, and I usually work from couch/bed/floor. My posture is terrible.

What has so far saved me from serious occupational injury is that I don't stay in one place for long - usually no longer than 5 minutes or so. I might shift positions, or stick my laptop on my lap, or start lying down, or get up and have some water. You can get away with pretty contorted working positions if you're only in them for 2-5 minutes and go do your thinking while pacing around.

Humans weren't made to sit still. Don't.