Is it better for a first-time traveler to fly into Bangkok or Phuket?

Hi all, my daughter, boyfriend and their daughter (then 1 year and 6 months) come to visit me in a couple of months. All Dutch so enter with no visa on 30 days exempt entry. Hotelbooking for 2 or 3 nights in BKK and their flight back home is no problem. Only on holiday 2-3 weeks. You think it's wise that they also have cash (2x about 600€ ?) with them ? First time Thailand ever.

Thanks !!

I'm from Bangladesh and i 'm planning on visit thailand on October. I didn't travel any country yet. Will it be hard for me if i have necessary documents? whats the chance of getting visa? i heard getting thai tourist visa is harder for student and first time visitor? is it true? Many thanks