My family of 4 (all NZ passport holders) have booked to come to Thailand for 40 days. We plan to go to Laos for 10 days in that time. We had thought we might do border crossings but have heard that it is necessary to show an onward flight within the 30 days in order to get on the initial flight to Thailand? If that is the case we may book a flight to Laos and return to Thailand overland - does this all sound doable and will we just receive a 30 day entry stamp each time we enter Thailand. Many thanks 😊

Advice needed

My niece is visiting Chiang mai first week of January, flying from New zealand using a NZ passport

Wanting to stay 4-5 months, however after the first two months she plans to fly over to S Korea for one month then return to CM for 2 months.

She is my niece,17 years old

What is the best visa approach?