Isometric using 2D sprite

Hi,

I want to make a RPG game in unity which has isometric view (like age of empire or iOS Clash of clan) using 2d sprites because my graphics team is good in this sort of art.

Can any one please suggest me how to start? What I learned so far after searching on this forum and google is

I have to rotate camera to achieve desire view but all examples are with 3D objects.

I want to use 2d sprites and 2d framework (orthello or 2d toolkit) can anyone please suggest which framework is easy to use with or have good support for isometric view and how can I start.

1. Tile base floor and fixed isometric camera.

2. Grid system so that I can place house and other sprites.

3. Pan/zoom isometric camera.

Thanks in advance.