Amanda, your question is understandable but, unfortunately, there is no real good explanation other than there is a shortage of housing.  Land which used to cost next to nothing just a few years ago to buy is now unaffordable to most.  That, in turn, hinders any new housing development. Getting good rental agencies won't do much to help the situation in my opinion.  When people, particularly °µÍø½ûÇøs, are forced to pay high prices because they don't have any options, this just fuels the cycle for property owners to demand more because the market is on their side.
I can appreciate the reasons for your wanting to move to Libya but it does not always work out that way. I found that I was much more "spiritual" while in the States because we made an effort to do things as a local community with the kids etc. After having lived in Dubai for almost 20 years and raising my kids here, I can tell you that other than Friday prayers (of which most women don't attend here or in Libya), what you may think of a more Islamic lifestyle is lost in the everyday living. I miss our community Eid prayers, picnics, etc.
If you want to discuss this or anything further, please feel free to send me a message.