Technical SEO To Boost Australian Leads

I want my Australian-based website to bring in noticeably more enquiries and sales. The site already has content and some basic optimisation, but the technical foundations need expert attention so Google can crawl, index and rank every important page for local searches across Australia... (Budget: $2 - $8 AUD, Jobs: Google Analytics, Internet Marketing, Lead Generation, Link Building, Search Engine Marketing, SEO, Web Development, Website Optimization)