Hourly Rate For Sales / Operations consulting job at a SaaS Start-Up.

I was contacted by a former colleague asking if I would be interested in a consulting job at their new company. The role would entail:

• Setting up sales tools.
• Cleaning up the CRM
• Working with marketing to create messaging to target key decision makers
• Outbound calling and setting up meeting with decison makers.
• Possibly building an inside sales team.

This is my first consulting gig so iam not sure what rate I should charge for my service.