Everything is still unclear. Is the financial statement only for the initial visa application or does ir have to be maintained in a thai account for 5 years?
What kind of portfolio is accepted for freelancers?
Is it possible to apply in a country that isn't your home country?
Get a sim from true or dtac, head over to the AIS store and ask to transfer your phone number to them. Then ask the store what pre-paid package you can get. You'll get 20GB, 5G for 300 baht a month, as a thank you for changing to AIS.