Looks like I'm not going to get my harem after all. :'( One of the girls was really enthusiastic about it, right up until her parents learned I was an Atheist. They told her they would disown her if she moved in with me. Unfortunately, that wasn't the end of it. The girl then turned on my girlfriend and started to scold her about how moving in with a man before marriage was a sinful act and how she wasn't being Christian-like.

My girlfriend is all upset now. Being a Christian herself, she took this rather hard. I think she's just now starting to realize that being "Christian-like" means to be totally convinced of your own moral superiority and consider everyone that doesn't agree with that as being beneath you.
The second girl seems unlikely to move in with me as well because of work related issues. Guess it will just be me and my girlfriend.