It would take me longer than an hour just to install the electrical circuit and disconnect box. Then more than another hour to bore holes in the brick wall, mount lineset covers, and run the lineset.

It's not a huge amount of labor and $5K+ for the labor portion is not justified, but if I sat on your sidewalk with a stopwatch and stopped you at 60 minutes, I'm willing to bet a pretty good sum of money that you wouldn't be done.