Tacx T2400 Satori Smart Trainer $299, Pushy's
About the cheapest semi smart trainer out there and this price is about the best you can get globally. Has manual resistance adjustment plus a progressive power curve, built in Bluetooth, works with ZWIFT and all your apps out of the box.
Beat the winter by staying on your own bike and keep fit. Also note a riser block comes with the unit.
Reviews
http://www.bikeradar.com/au/road/gear/category/accessories/r…
http://road.cc/content/review/175188-tacx-satori-smart
Would personally spend the extra and get the Vortex as a minimum.