Integrating and Cross Referencing with other sites

I have one big project that I have divided into 4 sections. Although I want one bid, I would like a message breaking it down by task. Please do not bid if you are unsure that you can complete from beginning to end. I am NOT a huge company with a big budget but do know that the work I am asking for is pretty extensive. I do not know what language it entails but the site that is already up and running has .php and the of most of the URL's. If need be I can inquire more if you need more details. The site is that of a Social site that will have end users. Task 1… when a new user is signing up, they will be asked to enter there address. I want that address crossed referenced with the link below to make sure that the address is a real USA address. The address will not be visible to any other users. I am sure that my site has the capabilities to store the data securely. [login to view URL]![login to view URL] Task 2… Once the address has been verified I need it to generate a longitude and latitude location for this user. Again, this will not be visible to other users. I have found the link below to do this part of the task. There is a second part of this task that we can work on after this is incorporated into the workings of my site. This part is not to be considered for the bid at this time. [login to view URL] Task 3… Once the account is created, the location or the address will be crossed referenced with the first link below. Because it may be somewhat complex, please see the second link which is only for the State of Florida and base you bid on the alone. I added another link just to show that all sites are very similar This cross reference will happen periodically and the user(s) will be notified every time a sex offender moves in or out of the user area. [login to view URL] [login to view URL] [login to view URL] Task 4… Would be to incorporate all the above into my site.