The important point you make is 'Go and see for yourself'. Why anyone would consider moving to another country with a child and dog without experiencing it personally is beyond comprehension.
35% on pensions which are tax free in their country of origin! I'd be opting for Cambodia in a milli-second if that's the case. Thailand is pricing itself out of contention as a retirement destination. F**king ridiculous!
I am 70, speak some thai, and was thinking an ed visa a cheap way to stay in the country, a good way to learn to read Thai, not just speak it and also helps structure your days. I would be very disappointed if there is an age limit.