C&D courses are hard copy, they have to mailed to you and the total cost is somewhere in the neighborhood of 3K with exams and such. After I decided I wanted to try home inspection, I called them , all I got was a machine, and it took a week or two before they returned my call.
By that time I had found InterNACHI, became a member and had a made a good start on the training I needed for the Alberta HI license. If InterNACHI was good enough for my former employers, it was good enough for me (I used to work for AB gov). InterNACHI Members get the Alberta Government approved for licensing training for free, C&D, also approved is well north of 3K once you have written the exam and obtained the AB required mentoring etc… If you follow the Alberta gov’t required training program you should have excellent training for BC. Find an inspector who is willing to mentor you and take you on ride alongs. Finding someone who is outside of the territory you plan to cover will make that easier.
I can’t help you on what you can expect re the Vancouver market. I find my clients are mostly first time home buyers who are nervous about buying their first home. There are business consultants and possibly BC gov. economic development who can advise you on how many inspectors a population base can handle. I would say based on my experience, you will need a second source of income when you start, and it may take up to a year before you make enough to live on. Having a background in residential construction is a great asset that will allow you to hit the ground running. It will take time and effort to get recognized, a web site that works is crucial to reach out to the first time home buyer. YMMV