Image: UbisoftOfficial screenshot from Ubisoft.
Hogar Dulce Hogar unlocks when you fully upgrade one Camp Facility at any guerrilla camp in solo play. Each facility has three tiers, and the top one gives the best perks.
1. Build a facility at a Guerrilla camp. 2. Upgrade it to the improved tier. 3. Upgrade it again to the enhanced tier. The trophy pops when the last upgrade is done.
Put the Bandidos Barracks at the top first, since that helps two other trophies. Check the upgrade costs early so you collect the right resources while you play.