Actually you got the idea with everything right! Maybe I'll make everything in one path, but can't say for sure :3
So... harem path is kinda possible, but it definitely will be at the very end of the game content
I have always been a person who values both artistic quality and narrative, and I see that you have both, and the cart placed is also visible, seeing that you plan a certain freedom of choice makes this project even more attractive, first of all I want to thank you for not following the lazy path and creating a generic project without its own shine, and secondly I wish you success in achieving your goals.