The GPS coordinates for Sangkhlaburi are approximately 15.15556°N, 98.45333°E. This town is located in the Kanchanaburi province of western Thailand, near the Myanmar border.
I'm guessing it could start from either end. Start probably the other end from the finish ! "The starting point for the trek from Sangkhlaburi to Umphang is typically Sangkhlaburi town itself. Many trekkers begin their journey here and head towards Umphang, passing through scenic Karen villages and beautiful landscapes along the way"
Nope ! Being retired has nothing to do with your income. 99% of we expats will have to file a tax return. If & how much we might have to pay is another issue.
Samsung washing maching still going strong after 11 years. Same for Samsung fridge. Samsung smart TV good as new after 7 years. Samsung phones for last several years, never a problem. Except for being damaged by self.