Here's something simple that might work for you. I've got 24 water carrots, and it took some fiddling to get them to work. AND I didn't bother setting them up the last couple of years. First I learned not to jam them down into the soil but take a very large screwdriver I have and ream out the hole in a circular motion a little deeper and wider than needed for the carrot.
When I say carrot, I mean they are just orange plastic cones that screw onto bottles, the bottles being upside down facing the ground. The carrots are the cheapest but others are available.
Next I learned to put a little sand in the bottom to act as a filter thanks to a tip from someone. That kept the drip hole from getting clogged so much.
Then I screw them to a 2-liter bottle with a hole cut in the bottom (used a woodburner tool with the hot knife tip), purpose twofold. No hole, water won't flow. The hole lets the water flow. Also I can go along with the hose and fill them up again.
And I could have cut pieces of nylon screen to filter out junk getting into the 2-liter bottles and secure it somehow.
I found this easier than a too heavy, too long soaker hose my neighbor loaned me. My smaller soaker hose with laundry tube attachment for correct reach worked well but you can't turn it on too strong or the bottom of your plants will get scorched.
Water isn't rationed here, drought is but not like TX, but dragging the hose got to be such a pain I don't bother.
I used to grow tomatoes just fine on the east side of the house. That shielded them from the afternoon sun and conserved water; one cherry tomato climbed 15 feet at least. On the beefier tomatoes, maybe the yield wasn't as good but it worked. Now too many trees shade where I used to grow them so that limits what can be planted there.
The only thing about the carrots is they require close monitoring for stuff that still drops in there, bugs, clogs, but maybe better than other solutions. Sometimes I had to ream out the drip hole with a needle, they are a bit of a pain, too, but helped getting some perennials a good start their first year.
I learned the hard way with a milk jug, can't remember how I set up the drip in the pouring part. But I noticed it caved in on itself if I didn't punch a hole in the top. How did I set those up, didn't have the carrots then? Oh, I remember. They had the drip holes in the bottom of a gallon jug with the cap OFF. I forgot I did that. In a way that's easier and more portable than the carrots, but had to haul them arount to a faucet to fill them. They do work fast to save plants.
I have to do everything myself or hire it done, so making raised beds would be too hard for me. I'm learning the lasagna method. I'd like a rain barrel, a couple actually and not gonna get them. I also need to rig up more stuff plants can climb on without being too unsightly, I guess the skinnier rebar teepees would be the easiest for most stuff.
Also I use an awful lot of chicken wire in my gardening. It's ugly but plants soon hide it.
As far as the heat goes, you just get used to it. Light and loose clothing and doing the midday siesta helps a lot!
I have used a similar product to the carrots you described, though mine were home made, and was told to fill them with pea gravel to stop the seep holes getting clogged. They are a handy way to provide constant water. In the south of Italy, where my in-laws live, people use pieces of drainpipe - 4 inch diameter, driven 4 feet into the ground, to water in new olive trees or grape vines for the first two to 4 years. Just go along with a hose (or buckets, which isn’t too good for the back!) and fill up each pipe.
Have you thought of using tree branches for your climbers? They look very nice, especially for peas or sweetpeas, and can be had for free from most people.