I'd try it out, see how it goes-but I have hardwood! My oldest started wearing undies at the request of her dayhome (Montessori program) when she was 19 months. She needed reminders, but every 30min sounds very time consuming!! I personally hate pull ups... I have 2 kids doing early training now (one in diapers, being changed standing in the bathroom, the other in cloth trainers), and I do reminders every 2 hours, or before starting new activities.