I have no concept of what "hour building" is because I haven't been at that end of the training pipeline for many years. When I did my CPL-H it could be done in 60 hours if you already had a PPL-A (from memory). There was no such thing as hour building because you spent all of that time (or more) learning the skills required to be proficient for the flight test. And then you had a licence and off you went to do piloting stuff in commercial operations. I don't see the point of punching holes in the sky for the sake of punching holes in the sky to pen a couple of hours in the log book. Unless the regulatory requirements today require a bit of sky hole punching. If that is the case, so be it. Doing it in NZ after the COVID difficulties have settled down might be a good option for you if you have a local connection.