http://www.tulsatowbots.com/faq.html
Here's what my neighboring hanger just bought. This thing is so cool it's unreal. Check out the videos on the website, amazing little unit. Now as for snow and ice ............ well he is going to find out real quick. Company said that they would take it back if he wasn't satisfied.
http://www.powertow.com/40ez1.html
The unit above is really the best tow out there for the money. Yes, it's gas but very simple. It also attaches without having to bend down and kneel on the ground. I don't have this one but wish I did. I have used this type a few times at some FBO's and such.