What are the challenges and costs of obtaining Thai health insurance for a retirement visa holder over 50 with a history of cancer remission?

A user inquired about the difficulties in obtaining Thai health insurance for a retirement visa, particularly for individuals over 50 who have been in remission from cancer for over 20 years. The discussion touched on various aspects of immigration documentation and financial requirements for the retirement visa, specifically the necessity of providing bank statements and the sourcing of funds, highlighting that differing rules might exist depending on location and specifics of application.