Maybe call Schwab to verify SWIFT fees? I'm not a Schwab customer but have been led to believe by friends who are that SWIFT fees are zero, at least for them. YMMV. If so, then the ATM strategy might be best for you.

The BBL/NYC/ACH transfer option was supposed to go away on 1 April 2019, but it was extended month-month while the SocSec IDD and IAT programs are implemented. It was extended by BBL until 1 July 2019, and given that transfers are still going through as of yesterday, maybe until 1 August 2019?

Establishing a standing wire transfer order, in person before you leave, is still a good idea, even if you never use it. Setting one up remotely can be challenging.

One final note, make sure you, or someone, has filed a valid TM30 for you BEFORE going to Immigration for any sort of service, like the Extension of Stay based on Marriage. This is a requirement which has only been more universally enforced.