Here is an option in northen Thailand. Perfect climate if you dont like it too hot.
https://www.wattamwua.com
You can stay as long as you want as a lay practitioner or you can ordain as a monk temporarily for as long as you wish.
You can practice your own way or follow the instructions that are given, it is up to you without pressure. There are only some compulsory activities every day ( joined sitting mediations, walking mediations, , chantings and offering to the monks).
There is no fee, you give as much as you want upon leaving without pressure.
The style of practice they teach is kind of similar to advaita. I would advice to read a book by Luangpor pramote pamojjo to understand what they teach (www.dhamma.com).
I love this place, I was there for 12 days.