What type of trellis do I want to build for fruit bearing vines on the south side of the house?
The choice comes down to personal preference, how much you want to spend and the amount of upkeep. For a large heavy vine(s) like you describe I would go with wrought iron. It will last decades with no real maintenance. It is also one of the more expensive ways to go but in the long run it is worth the cost in my opinion.