What would the result be of re-painting a slightly rusting door?

Im going to be getting a Macao paint job inn the coming weeks. they’re not doing any primer or anything, the car has its factory paint job, just getting something to match up door paint after replacing a door. I’m not 100% sure if they’ll even be painting this inner-lower part of the door, because they’re not taking the interior molding off to paint the whole thing or anything. I know they’re not painting the inside of the trunk hatch.

Heres the outside and inside of the door currently:

Im curious what peoples thoughts are on Pros/Cons with:

a) going through with paint job as-is, meaning Macao would likely just paint the exterior, not sure how much of the door’s inside would be painted

b) get another driver side door without rust then have it painted

c) use existing door, but sand down rust as best as possible, prime and then have Macao paint

Keep in mind, im just looking for the car to look decent for the next 5-7 years. it won’t last forever, especially in the midwest