Video inspection system advice

Hey all, I’ve been doing home inspections here in washington state for about 4 years. I’m thinking of some add-ons to my buisiness and the idea of a video scoping keeps comming to mind. Chimney flu inspections as well as sewer line scoping is what I’m thinking. If anyone can give me any advice in these areas as well as advice on equipment it would be greatly appreciated. I found a video inspection camera made by Wohler the vis 220 in the professional equipment catalog that seems like a good fit and only costs $1,895 as opposed to many others at $4,000-9,000. If any has info on this unit I would love to here from them. Thanks in advance, Tim Halpin-Pacific Inspection Services.