This is not aiming at anyone, but to share information.
Let's say your pay is around $2.5K, your salary component per hour is around $13.5/hr. Normally, 2 person are deployed to a single project site cos they need to bring drill n ladder, etc.
A typical professional installation along the wall with trunking, drilling, mounting, installation of mobile & laptops. end-user education, clarification of single camera, can take up to 1 ~ 1.5hr, simple dun care trunking look nice or not, can be achieve under 30min ~ 1 hour. Not including your travel time here n there. Over all, 1 single project can be 2~2.5 hours. Some people delay your setup with unforseen circumstances, held up by work, can you charge them cancellation, next day come back install and bill them your initial travel time? NO. They WILL NOT pay.
Estimated material costs between $20~$30 perhaps depends on what you use. So, at this point, the cost for doing your home setup is (13.2*2guy*2hr,$20material)=$72.80. What have not include is petrol/diesel cost, parking charges, ERP charges, vehicle leasing, etc.
For a company to survive and grow, minimum they need to earn 3 times or more of the costs incurred within 8 hours operating hours. $80~$150 is not expensive honestly. The more points to be installed, if simple, some gives discount. And of cos, how they do the installation, the cheaper the price they quoted you, you do not expect sibei chio service please.
Last time, some forumers offer setup IP cameras at $30 each with materials, after a few setups from mulitple forumers, they disappear, do not want to do anymore. Why? I leave it for you to think.