Part 5/8:

Midway through the project, the friends encountered an unexpected hurdle when the RV refused to start. After diagnosing the issue, they replaced the battery and discovered that the starter was faulty, requiring a careful replacement. With each step, they ensured the engine was running smoothly again, but a slight leak and neglected components on the roof brought additional challenges as they worked on waterproofing and ventilation systems to ensure the RV was road-ready.