Reason why i want to know what goes into dating site is so i know who and what type of programmers to hire.
IE buying Facebook fans, having them click adsense along with having an analytics account. I was asked from the start what I thought of the idea but never talked to the nephews. At the end of the first month and a few days later with the investors anxiously awaiting the progress of this report they'd probably be a bit chagrined finding that all of my contact information responded with ....."left town" forwarding address unknown. You need a very good business plan, tons of market research, a budget, some very unique selling points etc.
before you get anywhere near thinking about the code to build the site - that's the easiest bit. As I said above, you may wish to investigate Content Management Systems like Joomla and Drupal.
The first question I would ask is why you want to recreate something that's been done to death for over 15 years? Times change, people change with new opportunities popping up daily. Those programmers will ask you what functions you want. Do you want to be able to maintain it yourself or hire someone?
You can get hire cheap programmers at freelance sites but unless you have a specific target market and unique competitive value, I fear you are wasting your money. Look at trends less traveled or ones that haven't been born. That's where the money is (indirectly mentioned a few weeks ago) and we are a big crowd. A year ago a childhood friend mentioned his nephews wanted to build a social site. I think they spent over five figures (not much, but ALOT for them) for what turned out to be a basic message board for hunters. Only a select few could, yet they seemed to claim thousands of members. Did all the wrong things as I've watched the site practically die after only six months.. Obviously i am not going to create the site on my own, i am going to hire professionals who are capable of doing this.
UPDATE: I would appreciate people to actually read my question and not just glance over it.