Hi, I previously worked for an agricultural trading company as an e-commerce marketing executive. I handle B2B accounts and social media, such as twitter to attract customers worldwide.
The main thing about online marketing is related to keywords. We shall find the right keywords for your twitter name and profile. Each and every words on your twitter as search engine like Google will use your name account as one of its searching parameter.
The next important thing is using the right analytics tool, find out where your keywords are coming from. If you are in Australia, which city has the most keywords popping out. Focus on the top 10 cities and mention people whose area is in those cities.
Also, with the same analytics tool, find people you are currently twitting with your keywords. And send an customized automatic reply to offer your product.
Last but not least, enter websites and forums related to your keywords. Join in the discussion on articles, leave a comment with the link to your twitter account.
Those are the strategy that I used working for my previous company. Of course result doesn't come instantly. It takes at least a year before our accounts and website was showing at top pages in search engines.
I would gladly start with a AUD 10/day pay for 5 days a week. 5 hours a day. I would record my work in a log containing links so you make cross check my work.
I look forward to hearing from you. Thank you.