I would not get a Bianca or any home machine for 200 cups a day. Get a used one group commercial machine; Rancilios and Astorias make good inexpensive workhorses.

For a grinder: get a used Mazzer Super Jolly and add the SSP Cast Steel burrs, or a used Eureka or Mythos 75mm flat burr grinder. Any of these options gets you excellent grind quality at a commercial pace and at a low price.

The traditional alternative is to avoid us chatty home espresso people, and find a local roaster whose coffees you really like. If you make them your supplier, they will hook you up with the right gear and teach you the right techniques to make them look good.

And here's a reality check. You will be competing against many cafes run by people who have worked as baristas, who know espresso inside out, who roast their own coffee, and who feature guest coffees from the world's best roasters. Cafes like this have been displacing old line places in Chicago, where I live, and just about all the big cities I visit. I don't know Melbourne, but I doubt it will be much different. So you had better be planning on drawing people to your place on something other than your coffee skills.