I guess my first question would be , what level is she? We did at least an hour each way commute for 5 years in the sport, and for the last 9 years it was 2.5 hours each way...we were at a local gym for the first 2 years and she outgrew it and we were advised to move so we did. "Better coaching" was not available closer. When we moved she was an 8 yo level 8 , so starting upper level optionals... I'm not sure I would have done it for compulsories.
For the early years , we had a carpool and that was pretty good but when it became necessary to move to the gym further away, some of our fellow carpoolers had decided to call it a day so it was just us, or more specifically, me. I fortunately have a job that was very flexible with me in making this commute possible... so we left the house at 1:30 pm to get to practice for 4 pm and we weren't back home until 10:30 PM at night (usually less traffic so we could sometimes make it in 2 hours) ...they ate in the car, did their homework in the car, I read in the car (although I hung out at the local library for the majority of the time).
I will stress that this is a huge committment and if you don't think you can do it or want to do it, pull the plug now and have her move on to other things before she gets more invested. She's 7 so she'll find other things she likes. But it would be a kindness to her to either go all in or all out from the get go...to do it for a year or two and then stop would be kinda cruel so I would think long and hard before I proceed with this. Was it worth it? For my girls, it was but I agree with Bog, when they went away to college and it stopped, I felt freer than I've felt in a decade.