1. Just go about as usual in Breakdown.
If you don't have a save that's ready to move on start up Breakdown level 1, from there find a community.
2. My suggestion while waiting for the RV mission to pop up is to get 20 "construction material" and 5 "fuel" (atleast that was what I needed) for repairing the RV so you have the materials ready for when you get the mission.
3. From there repair the RV (takes 30 minutes), also I needed to locate a driver for the repair.
I don't remember if the item that's needed for the repair is random or if it's always the same on Breakdown level 1.
4. After that move on to Breakdown level 2 and the achievement should pop