I can't comment on the hop variety to grow with your 100+ºF temperatures since I'm way north of you in MA, but I would be concerned about the hops becoming to dry with the amount of heat energy reflecting off the south side of your house, especially if it's painted, aluminum or vinyl siding. Most hops (but not all) need the full day's sun, but also like the other side shaded. With the reflected energy off the siding, the whole plant gets too much sun and may burn. Your inclination then may be to water the hops more to prevent the burning, but hops shouldn't be over watered especially on the leaves. I somewhat disagree with others by saying whatever normal rain you get should be enough or at least water them to the average amount of rain you should get. I've also found that hops like to have the breeze blowing through them. This helps regulate its temperature and along with ground watering will help prevent leaf diseases.
As far as the siding being ruined goes, hops are Bines rather than Vines. Vines grow by tendrils, which wrap around structures (like grape vines), or suckers that attach to the things (like English ivy). Tendrils can get underneath clapboards, shingles or vinyl siding, looking for the nails to wrap onto, pulling the siding away from the sheathing underneath and those little suckers are like barnacles that can be hard to scrape off your siding.
As stated by others, hops grow upwards counterclockwise - following the movement of the sun - up strings or other supports such as trellises - using little hairs on the stalk to assist in the climb. The clockwise growth also regulates the amount of sun each part of the plant gets during the day. The hairs do no damage. They don't wrap or stick. They're like fingers holding onto rocks walls.
I would try the strings rather than the trellis because: 1) it would be easier to cut the hops down at harvest time, rather than having to pull the bines out from the trellis. 2) it will allow more air flow between the house and the plant. 3) keep the strings as far away from the house as possible to reduce the heat reflected by the siding.
Give string a try. Go forth and grow your hops!