Drupal 7 Dynamic bubble Graph

Custom Drupal 7 Module development.

GOAL: Display a bubble graph dynamically, depending on variables chosen by the user

PROCESS:

Step1 :
User select the content type (visibility depending on his access rights)

Step 2 :
for the selected content type, user can select 2 items among a list of all the numeric fields for this specific content type. Fields should be displayed with their user friendly name (not machine name).

Step 3 :
Module will display a 2D bubble drawing with the 2 selected variables . The displayed point is the node with those 2 fields. It can be clickable with a link to open directly the node. On hover, the title should be displayed .
Optionnaly for the user, a 3rd variable can be added and will be displayed as the size of the bubble.
X and Y Axis should have the proper labels displayed.

An example of the expected graph is displayed in the PDF attached
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IMPORTANT
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DEv and VALIDATION:
As we can't share data from our customers, We need the Developper to setup his own validation server with some dummy content types and dummy fields.
He should be autonomous to test the module on his own server and then we'll test it on our customer development server.