I would guess by looking at your post and your cage that you will make out just fine, but since you asked, Ill throw in my $.02
You may need to fashion a draft skirt around the tray to keep cold air from flowing in from down low during the cold months, even if you provide shelter. Often when its cold you find these silly birds huddled in the coldest place they can find. If you aren't using a tray (looks like you could do either with that cage) you need to skirt around the whole bottom. Just stapling up some construction plastic is sufficient and the probably most effective option as well as being the cheapest. It also sometimes comes in handy if the roof leaks during rainy times.
They defecate far more than you think they do. More than you can imagine. Sprinkling kitty litter on the tray after you clean it each time helps with the...aroma.
If you stay at this for any amount of time you will lose patience dealing with a turd tray. It's ok for the first year, maybe two but it really wears on you over time.
In the summer they will draw flies, you might as well know now. It's not horrible, but can be irritating. Fly paper is nice.
Small opening on any feeders/water fonts you make as they will be defecated in/upon. Coturnix will also waste as much food through the wire as your feeder allows them to. They intend to eat the food off the ground after they scratch it out of the feeder, they just never, ever realize there is no ground for the food to land on. Coturnix have little ambition to move upwards unless driven, so elevating the food and water source just a bit can help keep the defecation out of it as well as keep them from walking and scratching in which they WILL do if they can.
The poultry nipples IMO are the best auto watering system you can use for quail. The trade off is that they drip a lot during and for a second after the birds are using them. Keep that in mind if using a tray. I always drilled a 1.5" hole in the tray underneath the nipples. The orange cups from GQF work great for chickens but don't let quail get enough water so i would recommend avoiding them.
A small butterfly net to catch them with, so you don't have to look or feel like a jack..... while being defeated by small creatures. It also helps keep them from wounding themselves trying to escape your clutches.
A small hospital cage or large tub to keep any sick/bullied birds in until they can regain strength. It's something most people aren't prepared for, but some of your fowl will get sick/ injured at some point so be ready now. Most often a few days under a warm lamp and free access to food water will fix up any ails your birds encounter. Vitasol or something similar vitamin supplement also doesn't hurt to have on hand. Antibiotic ointment for any flesh wounds, but make sure it doesn't contain painkiller. Eye infections can be deadly but absolutely do not need to be, so find out where you can get terramycin or vetracyn or some similar antibiotic now as they can be hard to find locally at times. Feed stores sometimes have them, vets can usually get them,
amazon sells them.
If you are eating the eggs a lot you will want to get a pair of quail egg scissors. Cracking the eggs by hand is a hassle. They scissors are the best $20 plus shipping that I have ever spent on quail.
Oh and pickling spice. For the eggs of course the birds probably don't like it.
Mostly you will find out what you need by not having it the first time you really need but hopefully this will help. Good luck!
Edit: You will likely have to teach a your birds to use the auto watering system so be watchful that they are getting enough water until you're sure they've learned. If they don't drink enough they can get nerve damage and there is no happy ending to that story.