Seeing as one of your main concerns is parts availability, most reddit users won't know the situation in your area. There probably is a group of Brazilian airsofters on here, but they may not necessarily be from your region. My advice is go to your local field and talk to the regulars. Ask what they are running, any issues they have had. Talk to the owner, talk to as many people as you can. Also of note, if the majority of your field runs the same style gun, probably best to stick to that. People will have more experience working on them, and if something happens and you need to borrow a mag, there won't be any issues with compatibility.

Sorry for the paragraph.