If he's a good frind of yours,you could tell him that there is a lot of time (and expense) involved in building. Have him pick one that he really likes and offer to build it for a small fee.
I've built models for free for a couple of good friends and coworkers of mine. Just a few models-not 10. They liked my builds,and they liked building models,but didn't have the time or place to do it. I didn't mind doing it,and it really paid off later when another coworker gave me a huge box full of models and kits that her son didn't want any more. I took one of those kits and built it for her son. A Plum Crazy Cuda. He loved it.