Hello,
I am a professional Drupal developer and consultant based in Moscow, Russia. Over the past 5 years, I have completed many Drupal 6,7 projects, including implementation of websites with complex modules and custom themes.
I am ready to configure your Drupal site so each user has its own subdomain after registration. Is your site live? What Drupal version do you have?
Looking forward to working with you on this project.
Thanks,
Alexey