A simple and popular way to copy files and share files amoung your devices.
You can configure one user to have read/write access to a shared folder. The rest of the users have read only access.
Here is how moneydance app describes the setup.
With IOS 7 you can use airdrop to transfer a file from one iPad to another.
If you do not have a server with a local Wifi Intranet, you are limited to iTunes ( or similiar apps ) with some computer.
Using iTures to transfer files:
Files Connect -- The swiss army knife of remote file connect
Windows File server
Configure WebDave on your server.
This thread has good info.
How to transfer files from your iPad to your PC with iPad to Computer Transfer
More ways to transfer files and access Word documents:
Try the combo of:
Diskaid on your computer and FileAppPro on your iPad
Good old FTP
FileApp and FileApp Pro
I use Mac OS pureFTP server. It comes as part of PureFTPd Manager software download at this site.