This sounds interesting, and appeals to me in a unique way. When I role play, most of the time my characters fight against slavery. Acquiring one that I am attracted to, and trying to find a way to free her in a society where that is not allowed could be interesting, as well as trying to bring out an individual spirit in someone who has been trained all her life to be a slave....
You may prefer a male owner, which I do understand, and being dominate is something that is new to me, so I may not be able to play the part well, but it does sound like an interesting scenario :)