Snoopy we built an Iris July '15. The best recommendation that I can give you is to expand it as much as you can afford. We expanded ours in the garage four feet to the side and four feet forward (into the driveway). We also expanded the bedroom side by two feet. We love having a larger garage for storage and the additional room in the bedrooms. The biggest mistake that we made was not expanding the lanai. That is something that we regret because it cost us more to add the birdcage aftermarket than it would have had we expanded the lanai as part of the construction and have it under roof.
If i can think of anything else I will let you know. If you have any specific questions don't hesitate to message me. I would be very happy to help. We didn't know about building in TV or about TOTV when we built so I would be more than happy to help someone else out if I can.
Hi, we are also planning to build an Iris in Fenney and will attend our design session starting January 23rd. I have done a lot of preparation by looking at other Irises and have created a document that describes what we want with pictures. If I can assist you, contact me @ 813-641-7674 or 770-354-6668.