Database driven fitness portal

Mission: A fitness portal which provides online personal training. 1) Website will have membership area for every registered user. 2) Membership area will have pages/links like goal, initial assessment, diet plan, exercise plan, progress report, tools (like BMI calculator etc) 3) The progress report page should reflect the current status based on the input provided by the user or admin of the website 4) A user Forum and a blog will also be part of website (not necessarily inside members area) 5) Website will be constantly updated with exercise videos/pics and articles by persons from non technical background. So there should be a way to do that. 6) Facility to buy a package and make payment online