Developer for work on Google form API

Project is for internal process work.

Description of what's needed:
http://tinypic.com/r/fdh66g/5

Actual form (example): https://kurve.wufoo.eu/forms/webmaster-payment-process

See full spec:
https://docs.google.com/document/d/12dUivKnMkzAwc__gNcWofrR2pd9lAZC_x7VMbTKrZXw/pub

Can you provide time frame estimate + cost estimate?

Please provide details on what framework you have in mind to use.

My ideal is a customizable CMS that has API integration options using PHP + MySQL.
Strong QA needed.
Code must be well commented.
Documentation on functionality must be provided for any future developer who may work on the system.