Can Zoho Creator Handle Complex Forms

This might not be complex to everyone but this is my first application form. Now I have a marketing agency and a majority of the clients do not have marketing plans so I am creating a form were the client can create their own marketing plan.

I am going to break up the marketing plan into 6 data base applications to be filled out.

This is what I want it to do:

While the client is filling in the questions they might need to stop save and come back later to finish editing. Is their a way to create an auto save and come back later?

Once the 6 applications are finished can they be exported into a text file so that the client can have for their own offline uses?

Can I link the 6 different data applications to a single client, automatically?

We also have a Client log in section of our website is their a way to post these data based applications in their client log in section of the website, automatically?

I might want to much but it would be great to have. Thank you very much for your help.