Well what you could do is Ally with others and when they go to a resident or anywhere to scavenge for supplies you could assist them with one or more of your own people and help them out
Your own person would be controlled by you and the others are by your allie
Plus you could make an equal chance of finding metal wood and cloth not a 60% chance to find wood 30% to find wood and a 10% to find cloth
so 25% for wood 25% for metal 25% finding cloth and 25% finding ammo
Good game BUT could add in more cars maybe when you kill someone then you get a multiplier of 1.1 then kill another to 1.2 and so on also could trade credits lets say 5000 for 10 premuim credits maybe