Yes, we didn't list it in this particular video, because it requires quite a bit of training before launching an HVAC business. That being said, you can make serious money with HVAC if you're up for it.
Yes, starting a demolition business typically requires training in safety protocols, handling of hazardous materials, and operating heavy machinery. Also, you may need to get specific licenses and permits depending on local regulations.
This will vary based on the scale of operations and the size of the moves you handle. Generally, small-scale operations can start with a team of 2-4 workers, while larger operations may require more staff for efficient service.