I hope the holiday works out for you and guests but it's something I would never organise.
My relationships with my Thai 'buddies' be they short or longterm are very contextualised.
Part of the reason that I have a few longterm 'friends' is that a huge part of their day-to-day lives does not involve me.
They have their culture, (esp language/dialect) their local friends, their families, their routines, their special interests and so on.
Take them to very different physical and social environment and I fear you will find that boredom and loneliness will set in.
When this happens you can wear youself out trying to humour them which is bad for both parties.
But good luck at any rate.
And beware the thirsty cougars-they love exotic meat.