Bravo to you for thinking of new things to offer!
A few thoughts that occur to me as a "ballet mom" of a 10-year-old dancer:
Prices aside (more on those below), it sounds like a good idea for the 2-5 year old set, but I am not so sure about ages 6-10 being as willing to do this with their moms. Kids are getting more self-conscious onced they hit school age, and by age 10, they likely would not be very willing to do a beginner class in most anything with a parent; you might do better to offer an "older beginners" class for kids that age, without parents, but perhaps with a title that doesn't have "beginners" in it....For a girl to start ballet at age eight or 10 is late in some cases, but of course not too late! I love the idea of encouraging girls that age to go ahead and start, and not worry about the fact that other kids have taken ballet for years already. Having them in a class entirely composed of kids their own age who are at the same, starting level is a great idea.
As for the cost -- I do understand that it's for, effectively, four hours of instruction a week (two hours mom, two hours child). And instructors must be paid! But still, the prices sound very high for something being promoted as an introductory activity. Around here (and we're in an expensive area where people expect activities to be costly), those prices would not fly, especially nearly $1,000 for a six-week class for kids as young as 2 to 5. As someone else noted, if the parent is mostly looking for a fun activity to try something new with her child, that price would be prohibitive compared to other activities she could do.
I also don't know that for a parent-child introductory class you really need a recital -- that extra cost could be lopped off. You may have some moms/daughters who would love to perform in front of other folks while others would be very balky (especially the moms!). Just a thought.
Also, if you want more business, consider offering a parent class in modern, jazz, Zumba, whatever. Our dance studio does some parent classes in jazz and yoga that attract a steady core of women, most of whom I think are parents of kids already at the studio. If you can offer it at times when their own kids are in dance class, even better -- the moms will feel they are getting exercise and using the time well while their kids are in dance classes.
Let us know how it all works out. Good luck with whatever you try!