Chickens generally can handle cold better than heat. So even with a heat tolerant breed water will be key for your location, especially if you want to be able to leave them a few days at a time. We set automatic waterers for our birds. Get a food grade 5 gallon bucket with a lid you can use multiple times (some lids are basically single use). Install horizontal nipples around the base (they leak less than vertical nipples). I used 5 nipples around the circumference. Then use a drill or whatever works for you to cut some slots so you can install a stock tank valve. Drill a hole through the lid to pass a hose through and attach the hose. I'll post a picture later when I get the chance.
You'll have to train them to the nipples, and with horizontal nipples they'll need to be probably 3 weeks old before their beaks are strong enough.
For feed, get a 3-4" PVC pipe and a 45° coupler and a cap. The cap blocks one end of the coupler, pipe goes in the other end. Add feed to the pipe and the birds can eat from the 45° part of the coupler. Best to keep it under cover as it's hard to keep the feed dry otherwise. That can easily hold several days of feed so you can leave and know they'll be fine.
Edit to add: Should have said 45° T rather than coupler.
Also, pics of the waterer system here:
https://photos.app.goo.gl/mdNebePhdnqFjOjP2
Hope that link work. If not let me know and I'll see if I can post them directly here.