Little bit of a Dark!fic --untrained Buffy meets Spike in La

The title pretty much says it all. Buffy's Mom dies whiles she is still in school in LA and leaves Buffy alone. Spike finders and makes her fighting fit, and that includes seducing her and arranging for her to have a glamorous career. It's driving my bats that I can find it on my own.

I don't know this story however I'd love to read it. Is there anymore information you can give so I can help search for it?

I don't think this is the one you are looking for but it is similar.
http://spikeluver.com/SpuffyRealm/viewstory.php?sid=32693&warning=NC-17

Summary: Desperate to kill his third Slayer, Spike seeks her out – only to find she isn't exactly up for fighting. He decides to call a truce long enough to get her back into top form; however, he is soon reminded of just how unsuccessful his plans tend to be...

This was making me crazy but I think I found it.

The Difference Between Us by Camille

Summary: Joyce dies when Buffy is seventeen leaving her destitute. She lives alone in a tiny apartment in Silverlake and though she is a strong slayer, she is worn down by her poverty and loss. Spike is a wealthy and powerful master vampire who arrives in LA to destroy the slayer. Once he meets her, however, he realizes that though she is physically a worthy opponent, she must be brought up to her full potential before they can battle to the death.