Paul-
Sounds like you have a good plan. I really like to see old Porsches fixed up and enjoyed. And since you already started on this one, it makes sense to keep on going with it. Just remember, even nice driver quality 912E cars stall out price-wise at $20k-ish.
Here's a recent similar 912E value thread for reference. On that thread, you'll also see the sale ad for my 912E that I sold 1.5 yrs ago for $14k.
http://forums.pelicanparts.com/porsche-marketplace-discussion/912270-looing-76-912e-value.html