Monthly Search Engine Optimization Plan

My company is globaleapps.com and I am looking for SEO services for one of my clients, this is a resale client and I am looking for a regular person, I have about 15 - 20 keyword phrases ready and all in a low competition space The site is www.treasurebythesearesort.com, we currently handle their web site marketing and social media however they do not pay us very well so I am looking for a good price for a potentially long term partner with multiple websites to do SEO The site is www.treasurebythesearesort.com