Red flags might be #'s 2 & 3 here:
http://www.joefrielsblog.com/2010/12...letes-1-3.html
So I would guess that your peak will be shorter and shallower than it would be with a base.
That said, your training plan sounds about as good as it can get, given your limitations.
If anything, you might think of doing at least a few long rides on the weekends, sound like you'll have to put down the skis for that though.