Samuel Fila - There are several ATM's in the duty free zone in Phuket, Suvarnabhumi and Dong Mueang so you could get your cash out before you pass immigration.
Surat Thani or Hadyai don't have ATM before Immigration.
In either case, it doesn't matter as you're supposed to have the required amount BEFORE you even coma to an ATM in Thailand.
If your work permit is valid for at least an other 8 months, it should not be a problem to get 1 year Non-B in Penang, doesn't matter if you have your own company or are employed by someone else.