SME Business Sale and Consulting - Australia

I'm starting a consulting / business sale business focused on small / medium enterprises with a goal of helping business owners prepare for sale through systems and strategy implementation, offering a professional sale process for buyers and sellers alike and becoming a preferred partner of accountants and lawyers to assist their clients in this process.

I would like to use the narrative of New College Oxford in my name, where the builders in the 14th century planted an oak forest to ensure a supply of timbers some 500 years later when the initial building deteriorated - using the theme of work today for the future.

I would like the name to be professional and adaptable to other offerings in future (i.e xyz business sales, xyz consulting, xyz insurance etc..)

I need to able to register a .com.au domain name under the primary name (i.e. xyz.com.au) or xyzgroup.com.au)