The best way I find is to use “Wise” sent to my Thai account (Kasikorn), I then use my K-Bank app on my phone to withdraw from Kasikorn ATMs, this cuts out branch fees, only the initial transfer “wise” fee is charged
Every Expat with a Thai chick I know sends money, it’s part of the deal, no money = no honey! You as a farrang, are expected to support her, it’s just the way it is…