Developing 120 question form

[eluser]Bruce Brown[/eluser]
I'm converting my Dad/Brothers's legal form service from running on a customized VPASP shopping cart (ASP solution) to Expression Engine. The site requires the user to answer about 120 question, click submit --pay, and then an email is sent to a document processing dept with the data to create a legal form.

The forms as they exist in the old site work with a MSSQL database with multiple related tables. For example the form asks a parent to name his/her children, with the info of the children in a separate related one-to-many table.

We're looking to create the forms for use in the EE site. We're seeing that we can probably do it with EE, but my developer, new to EE but very good at PHP seems to be not very excited about the solution of writing custom PHP to store the data in weblogs. I've asked over on the EE forums if there is any benefit to CI in this instance, especially given the implenting EE 2.0/CodeIgniter synchronization. I'd like to program our solution with that in mind.

I'm probably way too vague here. But, do any of you think that creation an extensive form is the type of app that Code Igniter is better at than EE? Are there good reasons to go with Code Igniter for this?

Bruce