My advice would be to consider buying it as it has tools that are better than pitstop.
You don't have to buy all the options that you don't need, like versioning, trap, object screening, etc..
My take is you must have coating and Spot handling as it's far superior to anything pitstop. Geometry tool is also very intuitive and powerful, although most of the functionality can be replicated with Pitstop.
By the way, with Heidelberg workflow, you do get pitstop license anyway so you can save money on it and put it towards extra tools that you will need for every job.
Mechanic without proper tools is a joke, why would you take away tools from your prepress operators?
If I could, I would buy every single tool out there, just to have it at operator's disposal. Even though some tools have overlapping capability, every tool is a different and that particular one might just help you push that job through at certain desperate moment.