I would imagine there is more than one new home irrigation company in TV. I closed my home in Amelia on March 21 by mail. I didn't have an opportunity to get back down here until my final move at the end of July. Therefore, I was well beyond any initial 30 day walk-through period. This was NOT a problem. I called my irrigation installer (Native Landscaping) a couple of weeks after arrival and they were here within a couple of days.
They could not have been more pleasant and thorough. Everything was explained in detail and adjusted as needed. I even received a video to watch (yeah, right).
I wouldn't be concerned about a 30 day window. Delayed move-ins are an every day occurrence and TV wants you to be happy. ;D If you have any concerns contact the Warranty Department. The are very cooperative.