Looking to the future we have a the Swords representing Mind, it's no surprise you're contemplating all the possible outcomes of your situation, good and bad. Holding firm in the past, you'll see the Cups giving a emotional argument on behalf of Body; the emotions you associate with the first time you held your child are providing a hefty anchor.
Congratulations on this exciting endeavor! October 15th is just around the corner, and though it will be here before you realize it, I see all of your careful planning and practice will pay off nicely.
The buzz amongst your group is apparent, it's gone unmentioned directly because none of you wants to rush ahead blindly. Even as you're all trying to keep your heads on straight and not get ahead of yourselves, you have a very nice balance of forward momentum (Knight of Wands) paired with the insight and wisdom which can only come from life experience (Queen of Disks). To complete this lovely landscape is the arrival of the "Success" card (Six of Disks).
This is destined to be an auspicious occasion indeed! You can expect the success of your concert to create a positive buzz around you for the next six months, especially if you continue to balance your excitement with strong work ethic. Though you may not see the money start pouring in immediately, you will receive enough positive feedback and a clear enough measure of your success that you will be encouraged to keep making a joyful noise.
I look forward to hearing all about the concert!