For Rent-NEW HOMES-seeking advertizing advice

[Matt Fisher]

I've recently completed building 3 houses in Des Moines, IA but I'm getting very little interest in them.  They are priced competatively, and a floorplan that has worked great in other nearby markets.  My other rentals get TONS of interest every time they are listed, I'm struggling with why these aren't. Granted, the holiday season is probably the worst time to list a rental...

I'm using all of my traditional outlets: Zillow, Signs and reluctantly Craigslist (I quit using this on account of the tire-kickers and scammers and dirtbags LOL). I even put flyers on some local high traffic bulletin boards... 

Does anyone have any suggestions that might help generate a bit more traffic? What should I be doing that I'm not?