You can also choose to build a home office for the type of business that requires the receiving of clients. Engineers could start building consultation service. Plumbers, electricians, and carpenters could set up something like an on-call service provider. There are a lot of other businesses you can embark on, and these are mere examples. For more ideas and business opportunities, you can regularly check out with the Franchise Council of Australia, Australian Trade Commission, and Indigenous Business Australia. These are government institutions and you can gain a lot from them.