I didnt struggle with anything. The op asked for diy fix. Turns out this truck is going to be driven by a 17 year old and not going in a car show and is not 500k. Yes there is a difference, knowing that is part of the professional part.
There is also some assumption that everyone someone pays does an excellent job,,, especially underneath on stuff can't be seen.
My response would have been different to a guy come and said, this is high end, want to win car show and don't care how much it costs.
What is obvious as daylight is several people didn't even bother to read the first post in this thread, or the other posts by the op. They just want to fix a little dent. It was others opinion to leave it alone. It was others said he should have sentimental value. I am with the op,,,, good place for him and his son to do a fix themselves.
They can probably live with the dent if it cost too much but it doesnt have to in order to be presentable and not eye catching,,, especially since its white.