What are the requirements for a DTV in Thailand if receiving funds from family?

Hi, preparing a DTV for around Feb 2027 and want to check if this funds setup is accepted.

I’m a freelancer (apps / remote work) for about 2 years. Monthly income covers my living costs in Thailand, but it is not a high salary. I can show freelance work (invoices / contracts / portfolio).

The 500k THB will come from my parent and a relative, not from a business. Plan is:

* they transfer into my personal bank account next month

* I keep it there until I apply in February (about 4 months)

* I also prepare a sponsorship letter and proof of the transfer

Questions:

1. If the money is from a parent/relative, is a sponsorship letter + transfer proof enough, or do they also want the sponsor’s bank statements / ID / relationship docs (birth certificate)?

2. Does the 500k need to be well above 500k THB the whole time, or is around 500k THB (equivalent in USD) okay if it stays above the line on the statements?

3. For freelance / digital nomad, is there an income amount they actually want, or is work proof + the 500k balance enough if monthly income is only living expenses?

4. Will they ask to see the deposit on the statement, and is a parent/relative transfer okay if it has already been sitting for a few months?

Thanks.