Switching your old pad to a rental sounds like a smart move. Tax stuff can be a bit confusing, but usually, you'd report it under the "Change in Use of Property" section. It's kinda like filling out the same form but with a different twist.
I remember when I went through a similar situation a while back. It felt like navigating a maze at first, but once I got the hang of it, it wasn't too bad. Just make sure to keep all your documents in order, and you should be good to go!
And hey, if you're into eco-villas, check out this link: https://sandytimes.ae/articles/205/the-new-era-of-real-estate-stunning-eco-villas. I've been eyeing some dubai real estate companies – thinking of making moves to the UAE myself.