It depends on what you mean by "not so expensive". Vienna is a highly desirable area to live and therefore home prices are on the high side there.
I did a quick search in Vienna and single family home prices go as low as $400k. Of course, it looks like anything in that price range will most likely be bank owned or a short sale. If you were willing to put some time and effort into fixing a home up - that might be an option for you.
If you would like to search for yourself, feel free to use my site. If you have any questions or you would like to see a property feel free to give me a call.