Can anyone share some info on Grand Andaman Ranong?

I have 3 American citizens who were cheated by a Visa company in Phuket and have now overstayed.

They are busy in the process of applying for a Retirement Visa and now need to have a new 30day tourist visa stamp.

One person has a medical condition so we trying to make the process as smooth as possible.

Questions;

Is Grand Andaman Open & easily to do?

Do they need to stay over night?

Any other info is helpful thank you.