I can't think of a single word that covers this, but there are several phrases that say something similar.
I don't mind paying so much for the ticket, it was well worth it, I had a great time.
The house cost me more than I expected, but it was money well spent considering how it will go up in value.
The sofa cost a lot but it was worth every cent/penny, it'll last for years.
I'm sure there are others.
not a teacher
Student or Learner