I'm considering starting getting into Android app development as something I could do on the side until I could build it up enough to leave my current job. For those that have developed Android apps part-time or full-time, how much would a developer with several years or more Java dev (web apps and services) experience most likely make a year (at least based on your past experience in Android app development) for either/both (1) developing their own apps for sale on Android Market, and/or (2) developing Android apps for others on an individual contractor basis (not yet incorporated)?
In addition, do you have suggestions for pricing apps? The following indicates average price at ~$3.50 USD: http://techcrunch.com/2010/01/26/android-market-pricing/ (I know it depends on the app's functionality and perceived worth to customer, but I also imagine people would be much less likely to spend $39 USD for an Android app than they would for an OS X/Windows application with similar functionality/intent.)
Finally, is it realistic to develop solely in an emulator without having a real device, and if a device is needed, what would you suggest as a lowest cost option to start with?