hey, don't take too seriously what other people say about tier3 verification. Most of the time you will hear such comments from people that are doing something unlawfully or who can't prove their money sources, etc. If you run a︀ legitimate operation, you will be fine.
Yes, the process can be complicated and some people︁ fail there due to misunderstanding what the compliance is looking for, but it is doable.︂
Feel free to contact me if you need some assistance with them, I can move︃ things.
P.S. it is impossible to know upfront what the compliance will ask while onboarding.︄