That is about the ONLY advantage in switching Non-O visa/extension from retirement to marriage based on banked money method. 😕
A marriage extension take a pile 'o paper, you also have to have the reason you're getting that extension (your thai wife) at the immigration office with you when you apply.
You only get a 30 day under consideration stamp when you apply for the year extension, then the immigration office can do a home visit (if they want to) and once that 30 days runs down you go back to get the year inked in
Compared to an extension based on retirement where you show up, apply, pay and get it inked into your passport that day (or at some offices by the very next day)
The choice is yours, but it's a decision you'd have to make and live with :)
You should be able to get the year detail transaction report and the standard Bank letter at any branch of your bank.
I think in Hua Hin those documents are only valid for 7 days from the date they're issued so don't get them too soon before you going for your extension.
Also update you bank book the date you are applying for your extension
As Brandon said, if you have a valid multi-entry visa and are just activating another entry on it you can get out/back the same day with no issue at Chiang Khong or Chiang Saen
BUT
If you're trying to get a new free 60 day entry stamp, you're going to stay out as many days as they tell you. (Usually overnight but sometimes 2 days)
The guard will tell you when you stamp out how long you need to be out before you can stamp back in
Also keep in mind if you have a entry/stay history of free entry stamps they can also tell you that they'll let you out by land but you have to fly back in,
So you make sure you find out from the guard when you stamp out what your restrictions about getting back in (if any) are
Sadly no, if you don't make it back before your current extension expires it runs out and you lose it.
You could buy a new 90 day Non-O visa from the Thai consulate in London online before you come back via the eVisa web portal
Arrive, get a 90-day entry stamp, and when you have 30 days or less left on that apply for a new yearly extension at your immigration office like normal.
OR
You could also come in free stamp entry on a 60-day visa exempt entry, then first apply for the in-country 90-day Non-o visa at your immigration office (if they are one of the offices that issue in country visas) and after you got that, apply for the year extension.
Of the two choices coming in with the VISA already in possession is the easier of the two as you then only need to get a year extension when it runs down
You're asking a question that no one on this group can answer.. still, I'll give it a shot..
What you have in your favor is,
Even though you've gotten 60 visa exempt entry you haven't stayed the full length of the entry stamp, nor have you extended that at the immigration office for 30 more days (like people who live here on free entry stamps do).
Your stays have been short, and time out of country has been significant, as in your not just bouncing out/back to get a new 60 day free entry stamp (like people who live here on free entry stamps do).
And for this upcoming trip you're only here for 2 weeks you would have proof you're leaving the country in case you were questioned when you stamp in.
I would say you're a pretty safe bet to get right in without much problem when you come back in Nov.
Only you can decide whether to get the new Non-OA visa before you come here or just come back this time free stamp.
In my estimation you are doing exactly what tourists do, come here, tour and go back to your country. I don't see any abusive free stamp entry/stay history in what you're doing