That does not sound like an ideal setup for iguana what so ever. I have a Beardie and I absolutely love her but they do require both UVB and UVA lighting which can get expensive. Sounds like your friend wants a cool reptile but doesn't have a concept on the work it takes to take care of one. Print out a bunch of extensive care sheets on whatever he's talking about purchasing and give them to him. If he's detoured by the care that the animal requires then he shouldn't purchase one. :/.