I can understand the flawed line of thinking that leads to not taking salaries and time into consideration when making comments like "why not just do it yourself?", but it's interesting how rampant it is. I've worked with people who are like, "To avoid paying some company $999/year, I'm going to invest $1,500 of my time setting up a free version running on hardware that has a smaller recurring cost (but still does have a cost). And let's just not worry about how much of my time might be required to support this once it's up an running."