I have two huge iguanas for about 5 years, one female and one male. I put them outside and phew .. the poop stinks .. it doesnt really smell for the first few months.. but after a year and or so .. boy ..trust me .. theres a smell..
iguanas are not likt chameleons.. the move around fast when they are young and hates to be handled. My advise is, handle them everyday if possible. Feed them before u handle them. This is to associate yourself with food and trust. My female can be handled pretty much like a dog . the the male iguana will whack u bad if u try to carry him. They will grow to quite a bit of size i would say.
This is the third generation of igunas which i have, this first one i had was an impulse buy and i manage to kill it with mbd (yes .. i know i am at fault and i take all consquences). Nowadays, i realise they dont do as well in quariums and sorts, mine thrived outdoors ( i live in the tropics) where there is sun available. They can get mbd extremly fast, so please use the UV and always exposed them to the sunlight.
Fed them various greend and fruits .. or they love bananas anyway ....
They bond extremly well ith their owner, if u r sucessful at taming them and makes a great pet.
hope that helps.