Dear,
I have 7+ years experience with Beckhoff/TwinCAT, and also with Custom made HMI in C#.
I am working in company who produce high tech automation line with Beckhoff control. I am responable for programming, comisioning and service line and HMI programing in C# WPF.
I also work like freelancer a lot and I just finish very graphicaly complex HMI in C# for machine with Siemens control.
I think I can do this job. I would like to see more details what are 5 screens I need to finish, do I have all communications methods prepared, step 2 detailed explanation,...
Everything can be done, but without those details I am not sure 100% about price. it looks like more complex project for maximum price you post.
All the best!
Aleksandar