This may be true, but it also makes the common assumption that your time (or the time of your team) is somehow worth $0 dollars. But, I imagine that you would be the first to say that your time is worth much more than $0 dollars.

Put another way, hardware stores sell paint and paint supplies all day. Buying those and painting a room yourself is certainly cheaper, but it assumes you have the extra time to paint and don't mind you being the laborer. Hiring a painter costs more, but saves you a ton of time, energy, and elevates the level of expertise you are bringing to the job.

Getting started is one thing. The ease of how you maintain and grow is another.