I ws considering something like this, do you have any video of it in action?
There are some cons:
- some users report text gets blurred out if used under direct sunlight for a long time. I don't use it outside so I'm not affected
- sometimes the BLE connection is sketchy. I'm not sure if it's hardware or software problem
- the editor features are very barebone so you may want to customize your own version
- beware there are unflashable edition of this device