Wordpress landing page with long form collecting data to export

Use Case Brief:
The website will be a landing page, that will be sent to purchasers of KingToronto.com through e-mail. The landing page's purpose is to collect purchaser choices and also inform purchasers if their option is a premium. The form of the page will then confirm the options, summarize the options, collect data in an exportable format.
Click Link
Load Website
User to face some sort of security restriction (Either via password or by code)
Load Initial Form
Form Details (Any more details required here? Please advise)
Unit
Purchaser Name
Kitchen Options
Light Wood (Included)
Matte Black (Included)
Glass / Stainless Steel (Premium)
Steel Counter (Premium)
Terrazzo Counter (Premium)
Tiles
Dark Grey (Included)
White Wall (Included)
Teal (Included)
Grey (Included)
Blush (Included)
Vanity
Yes/No
Bathroom Material
Electric Charging Station (Premium)
Submit Button
Confirmation Window (Warning of any additional)
Load Purchaser Form
Summary Table
The website should contain some sort of security ability to defer nonpurchasers from the page
Website data should be accessible in CSV format
Website is standalone, will be coded on Wordpress, and will likely be on a subdomain