Hello
I have been contacted by Freelancer Recruiters in regards to your project, I do have over 28 years extensive experience with Filemaker Pro and have developed, deployed and maintained many instances from very large and complex down through to small more simple deployments.
I have looked over your project details and attached mockup and if I am understanding correctly, it is very similar to a project that I have just recently completed earlier this month (that one was using iPads in the field).
If you would like to contact me to discuss the project further, I can get some additional information from you, including which version Filemaker you are running, if you are planning to use the iPhones in 'online' mode or 'offline' mode when the sales reps are creating new orders and any other relevant details. I can then get back to you with a proposal for completion of the project, with a more accurate timeframe, costings and some milestones we can work through during the project.
Thank you
Darren