If you think that make a dripper, get a old coke bottle or something and peirce a hole in the bottom with a ear ring, just one hole is enought and sit it ontop of the Viv full of water and it will constantly drip water at a good slow pace through out the day so you little fellow will have water...
Sorry, WC is wild caught chameleon. In the wild they generally carry illnesses and its not going to affect you in any way, it's normally from eating wild crickets and such witch carry all kinds of infections and if its hot on the balcony put a damp towel over a third of the Viv so he had a cool...
Looking after WC chams is very diffrent as there used to eating when they want, if you have a garden or a balcony I would house your new little guy there for large parts of the day, putting him in the window he may over heat as it will work like a greenhouse being walmer threw the glass plus...
He won't die from over feeding and 4 every other day isn't enought. Try ten or more 5 times a week
He will need UV as the UVB won't travel threw the window
One of my favourite locals, I've thought about working with them so many times but they would be hard to sell on our little island witch is a shame as there beautiful