Jamie,
There are a couple other things it might have been well to mention concerning the time I spend making a new figure. First I suppose is that the times given are really only guestimates, I've planned, for years now, to time a sculpt start to finish but never quite remember to start the clock once the inspiration strikes. Besides I usually have 2-4 figures going at once when I'm really working well. I do a little on one; put him under the lamp to harden while working some on another and so on. This can be an oddly frustrating way of doing things as a couple of weeks, or more, might pass before actually finishing anything, but then all at once there is a big payoff with two or more figures finished up all in a day.
So what I do is estimate the time spent each day, some of this time is bound to have been somewhat less than productive, divide by anything completed and name that 6-12 hours which is probably reasonably accurate.
Also, unlike the figure you're working on I have several little cheats that help me progress faster than I might otherwise. First; I use cast bits for the hips and upper torso (more just the shoulders), saving a lot of time bulking up a wire armature. Second; I have, having done this for so long now, basic head, hand and shoe castings (I am in the habit of naming these armature bits too) that need only be refined for the particular figure being worked on. I couldn't really say how long it would take to produce a figure completely from scratch without these aids, and really wouldn't want to try it again. When I start work in a new scale-which I have to do sometime this year-I'll first make up the armature bits before attempting a figure, and use castings from these for the actual sculpt. Besides, increasing my productivity these armature bits also help me to keep things to scale, which is sometimes the most difficult thing for me to insure with a sculpt. Having some mass already in the armature makes posing easier as well.
I'm sure that a girl in a skirt will need making before the year is out, besides the WRENS and others already scheduled. The period will likely be 1940's or 50's as these are the ones I am currently making figures for. The hair style will probably be the thing that dates the figures more than anything else, though with a hat this may be less distinct, that is if the hat itself isn't too dated.
Ray