Off the top of my head.
I think we’ll run new wiring from the breaker box in the basement up to the third floor. Then install a few pull string lights from the rafters and get them on their own circuit. Once we have new lighting, cut the breakers to the old knob and tube and completely get rid of all that.
From there we can add a new circuit with grounded outlets and switched lights. We’ll still use the pull-string lights until the new ceiling is in place with the switched lights.
That’s when things really get interesting.
Install gable end vents with thermostatically switched fan (and possibly soffit vents)
Insulate
Hang ceiling
Pull up floor boards
Drop wiring to second floor office (and possibly the other two bedrooms)
Install sub-floor (leveled, but not sure game plan for that)
Re-install the repaired flooring
Paint walls and ceiling
Finish floor