Bank statements for last two months need to be signed by someone at the bank. They will do this at your bank no problem.
Also be aware you will need an update in your bank book for the morning you go confirming the money is still in the bank.
Everything else is covered by other peoples reply’s.
Once immigration have all your docs they will come to your property within 14 days. At this point you need two different neighbours to confirm you live at that location. They will take a copy of their Thai ID as well. Then immigration will take photos of you all outside the property.