It needed two of us to move my ML7. mainly because the motor, ,hanging off the back, made it so horribly ungainly.
Fooliushly, I separated base and column when moving my RF25 mill into the new (At the time ) workshop
It was much easier, next time with a 1 ton engine crane! But they don't go upstairs easily, even when folded.
A mini lathe cxan be moved single handed, but will probably call for two or mthree pauses for breathg and a rest climbinbg stairs, especially of spiral (Resat one end on a higher step (Prerferably the Headstoock end which is likely to be heavier (And even more so if tailstock and Topslide are removed ).
Idealy, a second strongman will make life, so much easier.
At a pinch, would it be possible to rig shear legs above the central shaft and hoist bthe machines up the central void?
Howard