Finally someone who knows what he's talking about.
I've been living , working and now visiting Thailand for over 30 years.
As you said , the best rates are in the basement near the airport link ticket office. As you also said , super rich do give very slightly better rates at their head office. Not only their head office though , their other downtown booths are also slightly better than their airport exchange booth but it is a miniscule difference.
Also the posters that keep repeatedly saying " you get the worst rates at airports , who would be so stupid to change money at an airport blah blah blah" . You people clearly don't know that downstairs in the basement the rates are totally different to the traps just before and after immigration.
Who did you go with and was it Istanbul or Antalya ?
I'm deciding whether to go Thailand or Turkey. Turkey slightly cheaper but I have used a couple of dentists in Thailand when I lived there and no problems.
just to add , when I was single and staying alone , I only washed a few small items by hand, occasionally, I mostly used the coin operated machines or occasionally the full laundry shop for my nicer clothes like dress shirts, trousers etc as they would be ironed as well.
I think I will be able to give good advice as I had several tattoos last year at wat bang phra. There are monks there using bamboo.
There are also professional tattoo artists upstairs that charge a set amount.
There is also a guy at the back ( sorry that's the best I can describe it ) that lives just behind the temple that accepts donations for the temple , entirely up to you how much you want to donate. The blessings and prayers are performed the same as the monks. I only found out afterwards that there are monks still doing sak yant. I left it up to my Thai partner to find out lol
The guy I used sits on his own , he is very good and uses bamboo.
I've had four different tattoos over stages ( different days ).
Maybe I will post the pics on here of my back at some point , can't do it right now.
Most Thais were using the man I used and there was a queue of around 1 + hour. I went lunchtime / early afternoon every time but be aware he stops around 4-5pm.