This is my plan. Host a wiki with tw reciever on php host. Activate local storage plugin save to disk and disconnect. Reconect with data available from my mobile and local storage working use in the browser. If reboot occurs return to online and load again with local storage restored. Save online when opportunity occurs by if loose network should be ok in browser.
When home office connect mobile to internet save tiddler to server and open on desktop.
Tw reciver should protect from overwrite but I plan to add additional features for safety and backup changes not wiki on each device.