C.P.
Your plan sounds solid. I would NOT put a TV in there, though. Too stimulating! I don't think TV is going to help her go to sleep at all. And if it does, then you're stuck with that problem. How about an alarm clock radio? You could just tune in a radio station at very low volume for background noise. We turn a fan on in the hallway outside our kids' rooms every night on High for background noise.
I think that as parents we tend to project too much onto our kids. She might be nervous and has obviously gone through a lot lately, but she is also capable, I'm sure, of learning to sleep on her own. Don't be too quick to assume that it will be a huge problem. Stick with your plan. We've found with our 4.5 year old (who also likes to have us in his room until he falls asleep) that if we just say "I have to go to the bathroom... I'll be back in 5 minutes... close your eyes... I'll be back to check on you..." that 9 out of 10 times he'll fall asleep on his own without us having to go back in at all. That 10th time he'll come out of his room over and over and we'll just keep walking him back to bed and doing the same thing... but that's usually when he's not overly tired.
I'm a true believer that when trying to estabilsh any new bedtime routine, make sure your child is good and tired! Might be a good time for lots of outdoor activities, a very short nap (or no nap at all) and a slightly later bedtime temporarily until the new routine is working well.
It will happen and she'll be fine : ) Good luck ; )