Hello there,
I can model your business process according to rules and assumptions in description, you can see my previous work :
https://www.fr.freelancer.com/projects/writing/Bizagi-Documentation-Standardization/reviews
https://www.fr.freelancer.com/projects/word-processing/Document-Business-Processes/reviews
I use Bizagi Modeler as software and i'm open to other one.
I will be glad to offer you my services,
Thanks & Best Regards!