should I ... go class or stick with functions?

[buran]

IMHO, Project looks like good candidate for a class. Probably some of your functions may fit as class methods, some of them may be "internal" or static ones and some of they may be better as utility functions - i.e. outside class.
You should distinguish between between e.g. Project.number property (i.e. that will be the number assigned to that project and some utility function that will be run probably once per project (when you have new project) and will generate the number that you will assign to the project. But this is just what I imagine is your workflow.
Note, we really don't have enough information to advise you better.