I have similar issues finding someone to rent a townhome I have here in Houston that's in a similar price range. It's a high end rental in a good area so there's not as many people looking to rent for that price. Houston is also in a slump for rental prices right now due to overbuilding of apartments and the oil slump. Don't lower your rental criteria, that'll cause long term problems that may be more costly.
Here's some ideas you can try:
Keep living in there and rent out rooms individually - You'll be able to manage it while there. Airbnb is also an option
Reduce rent - Figure out what the lowest you can accept with all contingencies taken into account and slowly step down the price.
Offer incentives - I had to do this since all the apartments were damn near giving away rooms. I offered 500 off the first months rent or a 48" TV. You can also offer cleaning services, gift certificates...etc. Get creative
Professional pictures - People shelling out that much money for rent want it to look good. They'll be doing their searching online before coming for a viewing. If other similar properties in your area have professional pictures it's probably something to consider to bring more people through the door.
Make sure that your listing is showing up on all the major websites people use to find a place to live. You can make a quick list of them by doing an online search for rentals in your area. I do fine with HotPads, Zillow, Trulia and Craigslist