Before I did a clutch cyl replacement I had read Brians threaded rod method.I found it a very effective way of doing this job single handed and with the car on axle stands.After doing one of my own cars I did another one for a workmate, modified the way I did it and used the threaded rod trick to remove the sub frame as well. Working this way I didn't need the use of a trolly jack at all and the beauty is that the sub frame is stable all the time and you don't need a second person.Like you I'm not a youngster