Marketing / Back Links for Weight Loss Web Site

Just some background information first to assist in detailing out the project. I have a web site promoting an all natural, cleansing / fat-burning meal replacement product. Manufacturers of the product use top of the line ingredients and make the products organic whenever possible. I've tried a great deal of supplements over the years as I have been into nutrition and exercising for about 18 years now and have worked at a General Nutrition Center store as well. This is probably the pinnacle of fat-burning / cleanse systems from what I've seen. The meal replacement shake part of the program really does make you feel better, it really does work, it tastes fantastic for real, and is packed with nutrients and enzymes to help you absorb and digest the product. Superior nutrients with a superior delivery system into the body make for a superior product. It is an MLM product by the way. What I need done: I want to have the site show up on the first page of Google at minimum, but would like to be in position 4 through 8 or so for a particular keyword if possible. A personal friend of mine has already achieved these types of results on Google for this keyword, so I know it can be done. I assume the primary way these results are accomplished is through back links to my site. So, it looks like for sure I'm going to need some good back linking done. However, doesn't matter in the end how the marketing is done as long as the end result is that my web site comes up in the organic search results on the first page of Google higher up in those 10 results for my particular keyword. The keyword by the way is the brand of the product. That would be the optimal result, but I am open to using other keyword phrases and combinations as long as they drive sales through my site. Depending on the return on my marketing investment and the money that comes in through my site, I am looking to use someone long term for continued marketing and upgrading of the web site. Please go ahead and bid on my project, providing rates, experience, skills and results achieved for other like projects. References I could call on to see how well the marketing worked for them would be a plus. Thank you again and I look forward to working with you.