Dance Recital - What should I do?

Hey everyone I'm new here to the forum, I'm typically a private hobbyist photographer for the past 10 years however recently I did a job for a dance recital. My cousin-in-law owns a dance studio and had 88 dancers to be photographed. I'm in a little bit of a bind, and I can use some advice.

I offered a service where the parents can first view the photos on a pixieset gallery, and then make purchases after. This motivated my cousin to no longer use her current photographer who required parents pay upfront, and then receive their photos afterward. 

My problem is, that a total of 4900 pictures were taken, hundreds were manually edited with Photoshop, and I am seeing on pixieset that the parents are logging in, viewing, and they are not making any purchase according to their pre-orders. In fact, they are not making any purchases at all to my surprise.  I received 49 preorder forms with their requests on packages. I released the photos to half the parents 24 hours ago.

I am debating now to take down all of the photos for the second half of the parents and require payment for them to even see the photos to begin with. I feel like I made a possible amateur move, by trusting people would comply with their pre-orders, and it will cost me many many many hours and money. 

Does anyone have any advice on what they would do in this situation?

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Digital Image Download Pricing:[/b]
Single Photo: $20
Package 1: $40.00 - 3 photos- 1 headshot, 1 dance pose, 1 group
Package 2: $75.00 - 6 photos- 2 costumes, 1 headshot, 1 dance pose, 1 group shot per costume. 
Package 3: $110 - 9 Photos - 3 costumes, 1 headshot, 1 dance pose, 1 group per costume. 

Add additional photos for $20, but discounted additional $5.00 for every extra photo. 
Manual Photoshop Enhancement: $10, flat rate for whole package. 
-Included in Manual enhancement: Frequency Separation, Skin Color enhancement, teeth whitening, blemish removal
All unused photos: $50
All Photos you see in gallery: $125
-Each photo contains a copy in 2-3 black and white filter variations, and 2-3 color variations (lightroom presets)



Here are some of the sample shots:

I'm not the most knowledgeable or experienced, but here's the way I've done it.
Four important rules for me:
1. Only sell edited photos to show your best work
2. Don't give too many choices, it confuses them, and only use your best.
3. If they are for view put a water mark smack in the middle to prevent them from downloading an unauthorized version.
4. Be reasonable with pricing because this is just another memory for them.

Usually photographers use password protected galleries online so only that student and their family can view them. I might downsize and go lo res, or at least jpegs (I'm used to usually shooting Raw). And watermark the heck out of the photos!! I doubt the average person would know how to remove them, and make them a nuisance to even try.

And make it clear in contracts that the gallery is for viewing only. Try ASMP for suggestions how to do this if the opportunity comes up again.

The other thing I noticed was the number of photos you took. Even with 80-90 students, the process needs to be more efficient. I'd try to figure out how you can learn and practice (maybe do some in trade - you get learning and practice, the dancer gets a complimentary photo or two). But I don't know what type photography you've done. I did sports, and mosty hockey, but I have done a little figure skating. You need to get to a point that you can take a few shots and get a good one. Or most of your photos should be usable to good to excellent.

If you keep working to bring up your skill level that would enable you to do this more effectively. I still feel after years that I get a little rusty and need to get in some practice. Sports are obviously a lot of movement and action and it takes being able to work fast, see/frame the shots, know the timing, etc. And this was a lot of sports portraits, and you got really nice photos. You have the talent, it may just take developing your techniques and learning the business aspect of it. Try ASMP or PPA for info.