Welcome to the site Luis.
Make sure you keep it greased and the chains lubed. I live in Colorado, USA and what I would call warm conditions does not cause problems for the belt. Warm for you is much different so it may be true for you.
Chains can last quite a while; 200 to 500 hours depending on manufacturer and how well you keep them lubed. When they do wear out, change them, so you don't have to buy sprockets too.
Yes, you can change the tires. Many of us do. There is a forum
<click here> specific to tire and track options and you will find quite a bit of conversation about the different tires people have tried. (How well they float, work in mud/sand/snow/etc.) Your options will depend on the performance in the terrain you operate in.
And of course we all love to see pictures of places where Argos go to play.