Get a hear rate monitor and do High Intensity Interval Training (HIIT). It’s by far the fastest way to increase your stamina if you’re untrained and even if you are trained it’s a very effective means of increasing your stamina.
While significant improvements in endurance performance and corresponding physiological markers are evident following submaximal endurance training in sedentary and recreationally active groups, an additional increase in submaximal training (i.e. volume) in highly trained individuals does not appear to further enhance either endurance performance or associated physiological variables [e.g. peak oxygen uptake (V . O 2peak), oxidative enzyme activity]. It seems that, for athletes who are already trained, improvements in endurance performance can be achieved only through high-intensity interval training
It is generally believed that in sedentary (VO 2max <45 ml/kg/min) and recreationally active individ- uals (VO 2max ≈ 45 to 55 ml/kg/min), several years are required to increase VO 2max to that of the highly trained athlete (VO 2max > 60 ml/kg/min). [21,42] However, Hickson et al. [43] showed, in eight sedenyary and recreationally active individuals, that VO2max could be markedly increased (+44%; p < 0.05) after 10 weeks of high-intensity exercise training (alternating 40 minutes cycling intervals at VO 2max 1day, with 40 minutes high-intensity running the next, 6 d/wk
Rather than 4x monitors, how about bigger and higher resolution monitors? I have 2x 27" 1440 monitors. They’re fine to read at 100% scaling, which gives me tons of space to put things. I often run four columns of windows side by side - two columns per monitor. Going back to 1080 in the office is a big downgrade. You could do a similar pattern with ultra wide and/or higher resolution.
Monitors with a built in KVM are tons cheaper in total, especially if you care about high refresh rates. I share my M27Qs and a mouse/keyboard between my personal computer and work laptop this way.
I’m not sure that I get the need for three laptops, but you do you.