I can't see how anyone is getting a better rate through Wise than through direct exchange through cash. The 3 exchanges down below offered the same rate as the Superrich orange branches, which is only 10-15 paise less than their green branch rates which are the best in town. A 3 baht difference between Wise and a basement exchange doesn't seem possible.
I was never asked to show mine. I was worried because I could not locate it in my emails and everyone in line had their phones open with the Q code showing. I assumed that it must go straight through to immigration when it is completed and appears on the screen of the officer who stamps you into the country.
They would almost certainly do something you would think if it were an Airbnb rental for less than a month. Although you say you went through a friend.
Drink drive unless recent will not get a mention and would not affect your ability to get a visa. Driving offences in general are not regarded as criminal offences.
I am surprised bus tickets are accepted, but I guess providede you get out of the country, immigration should be satisfied. Them there is the airline to keep sweet.