In Bangkok, you can pay your Electric Bill by card through MEA website. So that means, you can do everything without a bank account. But would be more comfortable to have a local bank account, I believe that you can contact an elite visa issuer and they assist in bank account opening.
As other people say, wise fee for making 2 or 3 transfers will be a bit bigger (like 1 or 2 dollars) so there is no reason to send it in one transfer. Better to split it into a few smaller transactions.