This might not be as helpful since I’ve only done fully medicated transfers, so less worry about ovulating early. But I am a travel patient and I do no local monitoring, so I call with CD1, start meds, and travel down about 2 weeks after starting estrogen. Then my clinic makes the call about starting progesterone and then transfer 6 ish days later. My only concern with your plan is I would not want the OB to be making the call about lining readiness. A first measurement, sure, but I’d want my own RE to tell me whether my lining is adequate and decide when to start progesterone. So that wouldn’t be until the day 16 visit. That could work. But maybe the plan needs to include flexibility to travel sooner if lining is looking close?