I’m a little dubious about how well the PhotoMatch system will work with an isometric drawing, since the system is designed to derive a set of vanishing points from the photo to compute the axis positions and camera focal length. Since an isometric drawing has no vanishing points, I’m wondering how well that’s going to work. Not enough to try it, actually, so I’ll just wish you good luck with that and wait to hear about your results.
But why don’t you simply construct whatever is depicted by the isometric drawing? You apparently have a fairly complete set of geometric requirements, so unless it’s something like a Gothic cathedral or an internal combustion engine it should be fairly straightforward to construct and possibly sort of fun. You’ll be constructing the same model either way, edge by edge and face by face; it’s just in one case you’ll trace and in the other you’ll copy.