I love the Kompact Kamp Mini Mate add-a-room. Nice windows etc. They are basically a custom add on and there is a lot of work that goes into them. Being in Canada, the exchange rate, duty and shipping makes it very expensive. I've decided to make my own... I am 2/3rds of the way through the project. Here's a link to the first video of the series on building this. I am not finished yet so there is still time for mistakes.
https://www.youtube.com/watch?v=nBoYSpyD0Uk