Looking for Top Down "Battle Brothers" style toolkit

Hi there,

I'm looking to make a top-down world map exploration game in the style of battle brothers. Basically something with these features:

- based on either a flat map image or unity terrain
- fog of war
- cities that spawn caravan "units" that move along roads
- bad guy units that spawn in dangerous regions like forests, mountains, etc.
- player movement of a single unit around the map
- quests provided to player unit when interacting with towns, and caravans, etc.
- good camera control that follows the player unit
- time of day, weather, etc.

I already have a turn-based combat system that I would use for the bulk of the fighting mechanics. I'm just looking for a toolkit that would save me as much time as possible on the above. Does anyone know of a toolkit that would work well?

Raj