Release a free version and after sell stable version, sure this will require a team work, much time and in the end someone prick will be pissed and release everything free again.
In the end, you can't control this. For me best option is pay for server files and payable updates/fixes like some Mu projects in the past.
In the end, you can't control this. For me best option is pay for server files and payable updates/fixes like some Mu projects in the past.