I have gone similiar route, but I would suggest to not go totally free. Having something for a fee in the outset with a free version is better because your user

I have gone similiar route, but I would suggest to not go totally free. Having something for a fee in the outset with a free version is better because your users will sign up knowing that not everything is free. If everything is free they could even end up resenting that at some point you have some add-on for a fee that they are not getting, regardless of there ability to pay.