I live in Jomtien and travelling backwards and forwards from Bangkok weekly. There was initially a ban on inter province travel but it was cancelled a couple of day's after it was set up.
doesn't matter where the money comes from if savings. Must be there minimum 60 (but possibly 90) depending on which immigration. I trued to make this method inside the country last year but had more than enough money coming from outside but nit same date. They told me if 400,000 for 60 days they would give me. Much easier outside the country in Savanahkhett
First time I was caught out I was fuming. 3500 to make a 30 day extension. I like so many people assumed that the address I wrote on the arrival card was enough.
there is a strong chance that you will need this. It is a very good way for immigration to make money. I believe the calculation is 500 baht per day but they tend to cap it at 1600 baht.
TM30 must e made with 24 hours of your arrival into the country. If staying at a hotel it is their responsibility. If staying in guest house it is still owners responsibility but often they do not do it and you are likely for a fine of 1600 baht.