I started with a cheap stationary bike and jimmied up the handle bars to hold my iPad. This worked ok, but not very well. The toddler kept messing with my high tech jimmied work and since it is an upright bike I move around too much to type. So I could watch a webinar or something, but not really work. Maybe I just move around too much.
In any event I bit the bullet this summer and purchased a light duty treadmill. I went back and forth on a few models before settling on this one http://www.amazon.com/Confidence-Power-Motorized-Electric-Treadmill/dp/B004TGWUPE/ref=lp_3407831_1_2?s=exercise-and-fitness&ie=UTF8&qid=1436332379&sr=1-2. It gets great reviews for working as a walking treadmill or for a walking desk. It is NOT for running. It is very narrow and a very jostling stop. It also turns off every 30 minutes. But it is affordable, compact and light weight. I would love it more it if folded easily.
The second step in my master plan was to find a desk or shelf for it. I found a ton of ideas online. But they were either too expensive or too much work. I don't need a full blown desk, I just want a mini desk of sorts. Just for light computer work. This is what I ended up finding. http://www.walmart.com/ip/16503526
My plan was to get some pvc pipe to make legs. But as it worked out, I was able to simply zip tie it to my treadmill.
Now, I have not lost 50 lbs or anything but I really enjoy using this. I've been catching up on webinars while getting a few extra steps. Once the kiddo is back to preschool (and not asking to join me on the treadmill every 7.8 seconds) I hope to schedule a morning walk on it while reviewing my emails.