SEO Optimization

Hello, We are a small new sailing charter company. We offer sailing lessons and yacht charters. We have built up our webiste and now want to enhance for SEO. We want to achieve 1st page search engine on Google, yahoo, bing, Ask and so on. We are on page one for some key words and on pages 2 and 3 for others, anything other than page 1 is not ideal We have a choice of finding someone here to assist or we can use Google Ad words, (not a preference due to the cost) Our webpage is [login to view URL] Facebook: [login to view URL] Twitter: [login to view URL] Our website is wordpress We have installed SEO Pressor and also Platinum SEO We are not sure if this needs to be a monthly maintenance program, or just every now and then. Perhaps the website needs to be more optimised, with backlinks? Happy to look at the price for the right person/business to assist