but you can enter on a tourist visa of at least 60 days you can obtain a non 0 retirement visa if you inbox me I will tell you how and what the cost will be
I am with Bangkok bank when I opened an account they said that you can't on a tourist visa. You need a retirement or long stay visa and then a letter from immigration giving you permission. Also a reference from an existing customer and proof of residence. Take the missus with you .