Those numbers are meaningless unless you specify what you get in return.

It is like saying that you pay $30,000 for a car. But the most important question is: For which car?

Also, if the installation services are so expensive, you can always install everything yourself.

Study how to do it, get the tools and materials, and then do it. It would be time-consuming, challenging and perhaps it would carry extra risks. Absolutely.

But it is not rocket science. It can be done. As long as there is a motivation to do it, i.e. a good value you will get out of it in return, it should be a valid approach to consider, in my opinion.