I would suggest, put your 800k in to a five year fixed deposit account. I get 1.25% for it with Bangkok Bank. Not only is it your visa guarantee but if things go pear shaped, you have sufficient funds to start new.

Then transfer your monthly 65k in to a seperate savings account and live of that.

Theoretically, using Visa Exempt, you can fly in as often as you want plus 2 times by land border.

But, if you have several back to back entries by air, eventually border control will scrutanise you about the purpose of your stay

Before you can use on-line reporting, you need to do one report at the immigration office IN PERSON. Nevermind if it's the first, second or third reporting.

As your reporting was done by an officer, that doesn't count as it wasn't done in person by yourself at immigration.

My son 😜

Secondly, you don't have to spend the money required to obtain a visa, just have proof of those funds. So no point in including that in your daily visa cost calculations.

If you look for the most cost efficient option, well the right visa for the purpose of your stay, is probably the cheapest.

If you want to stay 60 days, a Single Entry Tourist Visa is cheaper then a free Visa Exempt & extension.

If you want to stay longer then 90 days, a Multiple Entry Tourist Visa is cheaper then 1 Single Entry Visa & extension.

If you want to stay a year, a NON-Immigrant Visa is more economical then several Tourist Visas and extensions.

@Frank-Steven **********

Yeah sorry 240 days. + 30

First of all the Visa and the Extension of stay are two different things.

Visas are the responsibility of the Foreign Ministry whilst Extension of stay are Ministry of the interior.

So ...

Visa Exempt only gives you 30 days.. ( with extension up to 60 days)

Single Entry Tourist Visa gives you 60 days (with extension up to 90 days)

METV gives you up to 180 days. (With extension 210 days)

Extension of stay is always 1'900THB ( I believe it just increased to 2"000THB but not sure) nevermind if it's a 14, 30 or 360 days extension.

@Paul ********

For peace of mind, you can go at any time to a local immigration office and get an extension of stay for 1'900THB

@Paul ********

So you pay 1"000THB on exit. If you're just a regular tourist, that isn't a big problem.

Yeah it's well known that foreigners get problems for overstaying but they are mostly people with a long history in Thailand.

If you arrive on the 1. December and fly out on the 1. January at 2am, you will go through immigration on the 31st December, so absolute no problem. At worst, you'll pay 500THB.