Thanks all, especially to
@Tod ********
. To sum up...
1. It seems KL is definitely not an option right now (unless that 6 months they state is 'statement validity within 6 months', which is unlikely).
2. Penang is maybe a possibility but I am unsure of the required financials.
3. SVK is a good albeit boring option for a multi entry (or single) non-o marriage based visa with no money in Thai bank required.
4. I also have the option to extend my current year extension for 60 days to allow money to 'season' for 3 months if I bring it over now and do a extension based on marriage
5. However, the 'seasoning' is not actually required for a dependent visa (but was for 2 months for me last year). And if no seasoning required then I could just give the extension a go as normal with the 400k brought over near the time.
At least I have some options :)