Hi
I read your project deadlines and you are after Leads at the beginning, because Finance Niche market is High competition market in Australia, and Businesses are ready to pay more than $10 per click on Adwords.
First of all, Please share your website So I can see your exact services and competition at your Location, Which City or Town you would like to target, If you are in countryside Town such as Albury, Bendigo and so on, then it will be easy to rank your website on page #1 within few weeks.
If you are target customers are Big cities like Melbourne, Sydney, Brisbane, I would suggest start with Adwords, not with Facebook, I have done this for one of Australian Finance company and they end up with no clients, I told them Facebook is for Brand Building and awareness, It's not easy to get direct clients from facebook as Adwords does, because Adwords will show up your Ad as per interested searchers, not to everyone like Facebook, but facebook can help you gather emails and target people when specific event happens such as Mid Year Sale promotion emails, and Christmas early sale or New year sale.
Note: If you are thinking to build your Finance Business in days then think Adwords, If you are thinking Build Business with facebook then expect weeks or months, If you are expecting to get found on Google, It definitely will take months, however If you are serious I can analyze your specific keywords competitors and their strength and target the one's weak.
Contact me Thank you