Jackie,

The age cut off for business skills visas if you are looking at a State Sponsored business skills visa is 55, not 45 ...

See:
Investor (provisional) (subclass 162)
and
Go Matilda - Your Gateway to Australia - Business Skilled Migration

Best regards.

__________________
Alan Collett. Registered Migration Agent, Number 0102534
Chartered Accountant
http://www.gomatilda.com and http://www.collettandco.com
Offices in Southampton (England), and Melbourne, Brisbane, Perth, and Geelong (Australia)