The rental market in Virginia is rather aggressive with many people wanting to rent and not enough houses to go around. This is likely because this is a popular vacation state and due to its proximity to the nation's capital, Washington DC.
However, you should remember that a new mobile home typically costs between $30,000 to $70,000 and a second-hand one between $15,000 and $50,000. This is a far cry away from stick-built homes that cost hundreds of thousands. In the same vein, apartment rental in the U.S. averages out to about $1,200 per month.