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So I solved my problem and wanted to leave the solution here for future reference.

Because I kept going to the Network Solutions Under Construction page, I realized I had to update the domain pointers/DNS (A Records). Once I pointed to my IP address and verified by pinging the domain name, I went to install again.

I installed the same way as my first attempt; mentioned in my initial post. This time it was a success and I could complete the install by accessing the WordPress admin panel through http://www.example.net/ex

Short version: If you want to install with Host Name, make sure that your Host Name is pointing to your server.