I'd just ask them to confirm. Worst case if it doesn't you can just transfer it back out and try again, this just costs money with the exchange each time.
for a condo purchase the money needs to be documented to have come from outside Thailand. Make sure you specify property purchase on the Wise transfer for the reason, and that your bank account is with Bangkok Bank. This SHOULD be OK if going to Bangkok Bank and the amount is large enough and you select the right reason, it will probably go directly and appear as an international transfer.
You need a FET form for the condo which you can get from the bank that receives the money, this will be easier if your account is in the same bank that receives it.
Might be no harm to double-check with Wise that it will be sent by SWIFT and coded international. I think it should be, and it would only be a risk under 50,000 or going to a bank other than Bangkok Bank.
Just that this is one thing you need to be aware of with Wise, their model is they don't necessarily do the transfers from abroad, if it is a smaller transfer they take your money in the UK and then transfer to you in Thailand from their local THB account. That won't come up as international and won't be eligible to buy a condo (or for immigration). For most purposes this does not matter, the money is fine. It's only if you need to document it.
Just to be aware this is a potential issue- and as I say if you select the right reason on the Wise transfer, it is for over 50k THB and your bank is Bangkok Bank, I think you will get it as an international transfer and it will be fine. I'd confirm with Wise though just in case, and so you have someone on record telling you this before the money is transferred.
if you open an account with Wise and originate the ACH transfer from your bank to the personal ACH details Wise will give you, rather than asking Wise to pull it from your bank, it's free, no ACH charge. The ACH charge is only if you initiate it from Wise side.
it may depend how much money you have with them, they may waive fees over a certain balance, or possibly even if you ask nicely. You might get one a month free? I think Fidelity does them free for anyone though. Worth asking.
they can do it if your US bank can code ACH as an international transaction, but most banks can't do this through their online banking systems. If you can get them to do it, it will work. Stuff like social security can do this and that can still go that route.
It's also possible they have just forgotten and are processing anyway. It's purely a US financial regulation that stopped them doing it, no technical issues. They were doing these for 10 years after the regulation started. The US doesn't want domestic ACH ending up outside the country.
Thailand it's $20k you need to declare. If coming from the US you'd need to declare $10k+ to CBP in the US when leaving, each country has its own number and you need to declare both ends if it's over the number. $15k you would need to declare to CBP leaving the US but not on entering Thailand. $25k you'd have to declare both ends.
Thailand it's $20k. $10k is leaving the US, so if you have $15k you need to declare it leaving the US but don't have to entering Thailand. There's no issue carrying any amount as long as you declare it and for certain things (like buying a condo) you would need the receipt from customs proving that you brought it in anyway.
"Individuals or tourists may bring foreign currency in the form of banknotes or coins out of or into the Kingdom without limits. But if the total value exceeds USD 20,000 or its equivalent, a declaration must be made to the customs officer at the time of passing through Customs."
There's no specific limit to how long you can keep leaving and coming back for another 60+30. But after a certain point (probably the third time you do it) immigration will probably question you over whether you are a legitimate tourist and may deny you entry. Or they may not, it's up to their discretion.
Up until recently they were quite strict but there has been a definite loosening of visa policy to promote the economy, so maybe they will be less strict on this going forward.
If you want to stay long term look at visas like the new DTV which gives you five years of unlimited 180 days entries.
These requirements don't sound to onerous, if you have them I'd just give them to the bank. Not clear what the question is, is there one or other you don't have?