This is a stealth mission. You must keep quiet and use silenced weapons, at least until you've secured the two VIP hostages. If their tango guards hear gunshots, they may execute them. Securing the first building is the priority. Although the buildings are small and contain few rooms, it's still a good idea to bring along heartbeat sensors to see what's in a room before you enter.
Coordination is essential in entering the buildings.
You'll have a better chance for success if two teams rush in at the same time from different entrances. After you rescue the hostages, get them back to the extraction zone. Controlling Blue Team lets you take care of things from long range at the edge of the clearing using Sniper view. After you eliminate the tangos outside the two buildings, the rest of the mission isn't that difficult. It's important to coordinate your actions.