I sure don't.

Today, and ARF guy had a broken stab on his foamie trainer. He was going to buy a replacement because he didn't know how to make the simple, 10 minute, repair.

If a person has more money than he knows what to do with, by all means go the foam or ARF route. If a new pilot would actully like to know a little bit about the hobby that he is pursuing, building his trainer will provide a basic understanding of the construction of his model.