Greetings!
I am able to develop the JIRA custom workflows that you are currently looking for. I will need a JIRA admin access to accomplish the task.
Here is the outline how I do create workflows in JIRA.
Step-1: Design workflow over any drawing application (e.g, MS Paint, Adobe Photoshop etc) or hard paper
Step-2: Implement the Workflow design inside a Workflow Scheme
Step-3: Associate the Workflow Scheme to a sample project
Step-4: Test and verify the Workflow Scheme in the sample project
Step-5: Deploy the Workflow Scheme to the target project when nobody is working in JIRA
*** I have divided our JIRA workflow project into three phases.
Upfront Amount (20%) - US $100
Milestone-1 (Up on successful completion of workflow 1 to 5) - US $200
Milestone-2 (Up on successful completion of remaining workflows) - US $200
Looking forward to hearing from you soon, if possible!
Best,
Sourabh