Back in the late 1990's WE DID when times were happy and hassle free! As successive Thai Governments came into power, the immigration rules got more and more complex, the worst being under Prayut. Fortunately way back, the "private agency business" and "Immigration consultancy" started blossoming to relieve the stress and worry. I will not elaborate other than to say my final retirement visa when I left Thailand in 2019 (after 20 years) was issued after consulting with my friendly local Thai Immigration officer - none of this 800,000 baht in the bank rip-off! For reference, I now OBEY the Immigration rules of Cambodia which are so, so easy, having just extended my annual retirement visa by presenting my valid passport (until 2028), proof of registration on Cambodia's FPCS, one pp photo and 300$.