Have you considered the advantages of hiring temporary office accomodation as opposed to the cost of building. What is the actual real cost of hiring a temporary Portacabin as opposed to the real cost of building?
As a business owner the gst on hire of the building can be claimed, plus, the full cost of the hire is a tax deductable expense in most cases, where as now generaly there is no depreciation allowance when you own a building
One client recently had a price to add a small office with a porch to the side of their factory. The cost was in excess of $40,000 + GST. They hired a middle size veranda cabin off us and found it a far more financially viable option for their medium term office space problem.