Reliable iPad based networking module development

We require a module to be developed for an existing iPad based application. The application is an ios based point of sale application used in restaurans, bars etc. We specifically need a module developed to handle offline networking between iPads ideally using WiFi and bluetooth, to share orders saved to 'tables' etc. The module must be reliably able to connect and share between multiple devices connected to the same LAN. Data is stored within the app using an SQLite database, however we would prefer if the module was objective so we can install and use in the application in the manner of an SDK. To give an example of data usage, a 'standard' order contains 1kb of data. The networking setup could be either hub-and-spoke or ring, whichever method you feel to be most reliable. The module should be able to search for and automatically connect to other devices within the network. Reliability is crucial to this project as this application is used in fast paced businesses. The network connection must remain in place in all reasonable networking conditions. Finally, we have posted this as a large project as we feel it requires a senior iOS developer.