Personally I feel that when they implemented private rooms they should of allowed everyone to have one at the rising stone as well as a garden plot near the entrance to Mor Dhona.

Would it have been an amazing way to give everyone houses? No but at least people wouldn't:

1, Feel they need to join an fc to have a private room.
2, Potentially lose that private room due to stuff happening outside their control
3, Everyone would have access to gardening instead of the few who either own houses or are lucky enough to be given access to their fcs one.

Hell It would have even kinda made sense from a story point you having a room at the scions base of operations.