Depends on when and for how long you are coming for. In one or 2 months (I am not sure of the date), you will need to fill out the arrivals card online before arriving. Sometime later this year or early next year, you will need to get an ETA.

Also, that 60 day visa exemption (it is not a 60 day visa) may be shrinking back to 30 days soon.

Again, all depends on when you are coming.

No. Once you have left Thailand, you get a fresh 60 days when you go back to Thailand.

You answered your own question.

You need to get the appropriate visa to stay in Thailand long term.

I will assume you have done this more than once recently??

🤔

When you arrived in Thailand the last time, did they ask for, and did you have a departing flight and hotel accomodations (not ABnB etc) to show?

Depends on when your flight will be. If it is in 2025, you won't have to worry about it. They need to make sure the new e arrival card is working smooth first

Take a short trip to Kuala Lumpur. Cool city.

The 65,000 needs to land in a Thai bank.