Jomtien immigration has often asked me where my 400,000 baht comes from but have always excepted my reply without having to provide any proof.
This year they have specificly told me that there needs to be at least 400,000 in the account for the whole under review period.
As for photos, yes they want a photo at the front door with house number clearly shown, I also provide photos of us sitting on the bed,sofa and standing in the kitchen/living room.
This year 2 immigration officers wanted photos of us and them in our house again... a resumption of pre Covidiocy policy.