How do people play video games when disabled?

I deal with chronic pain and things like POTS and IBS, etc. I go weeks at a time without being able to play my games because I cannot stand to sit upright in my chair for more than thirty minutes at a time to actually use my PC, even though it cost $2000 and I REALLY wanna play it.

For fellow disabled gamers, how do you guys sit at a desk for hours and game? Do you have like the coolest desk chair of all time? Or do you somehow put your monitor over your bed? Any advice would be great because I haven't been able to game in three weeks now and I missed a huge event in one of my favorite online games this month because I couldn't sit at my desk.