Privately owned mains distribution transformer

Would there, impedance-wise, be much benefit from investing in a dedicated mains distribution transformer installed right at the outer wall of the building?
If I use 9 gauge wiring from the transformer onwards, ending at dedicated Edison silver-contact sockets, will I really even need a regenerator? How much electric filth does a (private) distribution transformer let through? Can my neighbourhood still eat from my sine wave by sapping the line feeding the transformer and would I have to be constantly concerned about DC affecting the transformer, magnetic hum issues, etc?
I guess there are some better quality transformers that perform better without such fragility to the line input?

Well, I guess the transformer might be more costly than even the largest power plant…
Anyway, benefits?