1) Yes, all GCC countries are red flags imo, I left germany couple of years ago︈ and kept my german bank account, so when I go back to germany I wire︉ some money there so that I don't have to pay the ridiculous amount of fees︊ when I pay there with my UAE CC. Well, the first time after I moved︋ to UAE and came back for a vacation in germany I wired a medium 5︌ figure amount of money for my summer vacation. What happend? My Bank (Well it was︍ a small local one) instantly froze the money because they suspected money laundry. After a︎ couple of MONTHS(!) I was finally able to access my money again. I instantly closed️ my bank account and moved my money away from germany. On the other side a friend of mine (german) living in Saudi since 10 years and still uses his german bank account frequently but its with one of the bigger banks in germany. In the end it might be a good idea to cancel all ties to your home country if you really plan to center your life somewhere else.
2) This will get you into big trouble I assume
3) Why would you need it if you actually really relocate to UAE or any other GCC country?
4) If you move to UAE, obtain︀ one there and after you got it and can imagine living there, cancel it. I︁ don't think its really needed but better be safe than sorry
Some general things about︂ UAE, I used to live there for 3years and frequently visited it before.
Its a︃ great place to live if you have some decent funds available. The rent can be︄ expensive if you want to live in a nice area in Dubai or AD (check︅ out propertyfinder) and if you manage to not get sucked up into the expat life︆ style you can actually get around very well on a decent budget.
If you are︇ not quite sure about UAE yet, I recommend you check out Bahrain, startup costs for︈ a business are almost the same but the cost of living is cheaper there and︉ its a little bit more laid back compared to UAE. Also you get a good︊ access to the Saudi Market if you are interested in that.
Also keep in mind︋ that currently the pressure of the OECD is very high on UAE. Just for example︌
UAE businesses need to soon be in sync with 'Economic Substance Regulations'