Greetings,
I have read initial high level requirements & seen the attached images but could not understand what do you want to do with the attached images?
About the changes, yes they are all doable but since this is already developed website, so first we need to analyze the existing code, understand the overall structure, after that we can start these changes.
About the costing, let me know, if you want break down of all the tasks or total cost? Normally we work on the total cost basis, I mean we will give you total Man-Hours or total cost, after that we can divide it into few milestones.
Let me know, if you want to review some of our past work as I don't want to bombard you with lot of links at first place.
Look forward to hearing from you and talking to you further thru' Freelancer message board.
Regards,
YK
LEADconcept