I'm pretty sure even if HOM flops with the general public Vanessa will still have a career in the music industry.
There are SO many artists that keep recording that would love to sell half as many copies as she has sold of "H&T"
Joanna Newsom
Ben Kweller
Broken Social Scene
Emily Haines
Metric
The list could go on and on.
Nothing to worry about folks, Vanessa will be around for as long as she
wants to be.
I'm a huge fan of both Emily Haines and Metric, and I enjoy Broken Social Scene, but I'd like to point out that they are indie artists on indie labels. Thus, their sales barely make a dent in those of many major-label artists. Vanessa is a major-label artist, so you can't really compare her record sales to some of the artists you mentioned.
I do think Vanessa would do extraordinarly well as an indie artist, though.
Anyway, I'm dying to see the HOM video and hear about any progress made with it. I wish I'd found out about the casting earlier; my brother and his wife (both extremely attractive people) live in LA!