Next to the bank statement you need residency in the country you like to apply for Multi Entry Tourist Visa. Only nearby Thai Embassy who does not require residency is KL. Bank statement of last 6 months verified by bank with minimum 30.000 Ringit (about $ 7100) a month. See their checklist needed for application:
*****************************************************************************************
************
*****
329-
*****
8-
*****
5.pdf