With an idiot/ignorant/clueless landlord,The problem if you have the work done yourself, it may not be satisfactory to them and they will hire someone to do it again/differently.
My claim to a judge is that the work didn’t need to be done at all. It was normal wear & tear.
I seriously would tell the landlord *in advance* that you intend on taking them to small claims court to justify their repairs to you.
Put het on notice that YOU are in control and not afraid of her, and that what she is asking for is unreasonable.
You are going to need to stand up to this bully or it is going to cost you. I would also follow through with filing in small claims court.
If they have already filled out the form needed for your loan, there probably isn’t anything else that will be needed from them, ever.
It sounds like in the long run you are willing to pay for ‘damage’ that you think you have done.
Let a judge decide what ‘damage’ is VS. wear & tear.
A sympathetic judge might even say that stickers placed by kids is normal wear & tear!
Many judges enjoy reaming people who are clueless about laws that exist and are bullying.
You stated that you don’t like confrontation, but that could cost you greatly in this situation if you don’t stand up top her.
There is also a chance that she will not provide you with proper receipts within 21 days.