Below is a good calculator for budgeting and calculating your net worth/statement of position.
Income-and-Expenditure-Calculator.xls (291KB)
Here is a loan amortisation calculator so you can map out what principle and interest split you pay over the life of a loan
Loan-Amortisation-Calculator.xls (164KB)
Here is a guide to residential property sale & purchase agreements.
REAA-Sale-Purchase-Agreement-guide.pdf (183KB)
Here is the application form to apply to Housing Corp for the Kiwisaver Subsidy, remember you will need to apply to your provider for the withdrawal of yours and your employers contributions.