Forum Ligen & Turniere Company of Heroes 2 PPF in Dubai, what do I actually need to know before booking?

So I'm finally getting PPF on my new Patrol and I keep putting it off because every shop tells me something different, one says full front is enough, another swears full car is the only way, and a third quoted me a number that honestly felt made up. I just want the paint to survive the sun, the sand and the occasional stone from a truck on Sheikh Zayed. A mate sent me paint protection film and their Quick, practical steps for car PPF installation in Dubai was actually the first thing that made sense to me, especially the bits about checking if the shop does wrapped edges and whether they let the film cure before you drive off. Now I'm stuck on two things, do I go with a well known brand film even if the installer is a smaller workshop, or pick the big showroom with a mid tier film, and how soon after installation can I actually wash the car? Would really appreciate hearing what worked for you guys.