The present 13" MBP is only $300 more. Will it run Snowy? I'm afraid I can't help my friend with support issues if she is running a different system.
Do you really want to force your friend to live in the "dark ages" just because you (and I
) do?
Yosemite has features that are missing, notably or not, as the case may be, from Snowy, and from my limited experience I'll say that if nothing else in Yosemite surpasses its Snowy equivalent, Safari is considerably faster (not to mention current).
