Those missions were highly priced because it became harder to look for them because most of the shops were already destroyed.
The numbers and strength of zombies were also increasing, so it got harder and harder to look for supplies later on, especially if they weren't strong enough.
So, even if they don't know and can't use the current machines and tools they have, it wasn't a problem for them.
They would just sell all of them later on if they weren't going to use them for themselves.
Their space was very wide, so they could put a lot of machines in the corner of their space.
Afterwards, they all stopped by a gas station again because Ava's car doesn't have any fuel anymore.
Unlike Treyton and the others, who always stopped by a gas station to fill up their cars and to get more fuel to be used later on. Ava's group didn't do that and was just rushing north.
