Some great answers here already, but I'll add my 0.00002 cents as well I guess. Lol
The great thing about quail that I've come to love; They're pretty dependable egg layers.
If you're looking for 5eggs a day, you
technically would only need 5 healthy, happy quails with some good comfortable lighting.
That being said, if you for sure need
5 eggs a day, no less; 6-8 would be the ideal number to house. (If those are all for you per day, do enjoy with caution. Quail eggs are quite nutritious, and too much of anything, good or bad, could have unhealthy side-effects)
If you end up with 3 more eggs than you need a day, there are lots of great options for use. You could give a half dozen eggs to a neighbour, or family member. Dogs absolutely love quail eggs (shell and all!). And you could even give them back to your girls! The extra calcium and protein is great for egg production!
If you're still waiting on a few young hens to start laying, I would check to ensure they're getting enough crushed shell/ calcium in their diet to start forming those new eggshells. Some quails will start laying early and productively at the 8-10 week mark, but some take a little more to catch up and get rolling. If they're new, or in a new enclosure, they may also be adjusting to that. So if you just bought them and someone told you "They're all laying", they probably were, but now they're resettling into their home. And as others have mentioned, consistent lighting for 16 hours a day is a must for layers.
Enjoy your quails! (And hopefully those delicious eggs soon, too!)
