I won't dissuade you because the Rolleiflex is a brilliant camera.
The Mamiya TLRs are also great and are more flexible.
However the purity of the fixed lens is, to my mind, more in keeping with the pleasure of having a great walking around camera as opposed to the superhuman problem-solving capabilities of a more complex "pro" system.
That's an interesting perspective. The Rollei is certainly a lot more portable than the Mamiya, & possibly more "inspiring" to use (I can't really comment on either; I've handled TLRs before a little bit but never really done any work with one). The C330s is certainly pretty heavy.
My perspective is that the most advanced C-series camera can be had in excellent condition from a good shop for $200, which is 10x less than the Rolleiflex the O.P. was looking at. For something that I would only trot out occasionally at best or use for some special situations, I'd have a hard time spending much more than that on it.