that depends on your timeline, when you get married etc. You can stay 90 days on visa exemption before you have to leave Thailand. (60 + 30 day extension).
I would personally make sure to have a cancellable /refundable ticket out of Thailand within 60 days of entering. You are also supposed to carry 20k baht equivalent of cash. Though its rarely checked, but officially a requirement.
Also make sure to be able to show documentation of your first few nights of accommodation.
Lawyer absolutely not needed. The 500k balance depends on the embassy/consulate you apply from. Some just look for closing balance, some look for up to 6 months balance over 500k.
When I applied in Jakarta, only closing balance was needed.
As with most official stuff in Thailand, each office has their own set of rules.
you gonna have to ask the bank why they have their rules. My thai friend called to ask them, and āunder medical treatment in Thailandā was pretty much the only way with a resident type visa.(retirement, spouse isa etc). So after i started my treatment i opened the account . This was quite recently
i do yes: me personally. And actually on first branch i tried. But i know in advance about Bangkok Banks Ā«medical clauseā. Each branch different obviously, but they do have a āofficialā clause from HQ specifically for medical treatment.
To be fair, there was conflicting information released prior to launch indicating «at least 3 days before». But its indeed 0-3 days. As also seen on website.