Creating a Project Management tool and want to keep it free for any team size.

Firstly, this is an amazing idea! For freelancers and 'solopreneurs', this can be an amazing alternative where they won't need to commit their expenditures to a productivity tool. Once they have a 'feel' of your product, I don't think they'd hesitate for a donation at least once. But at the end of the day, it's all about survival. If you can survive with donations and few (or many 🤞🏻) premium members, that would be superb for you and the business! All the best for your project! Cheers!