When to say enough

After spending a couple weeks traveling on business, I was ready to return home and "bang out" the office. Really, it's a pretty simple job. Demo one wall, pour a 3 1/2 overpour in a 3'x9' space, frame out about 9 linear feet, pop in two windows and a door, insulate & seal. It's not that much work and none if it is very tricky. Except for a couple things...
It's early June now in Arizona. That means that by 9 am, it's about 100 degrees. That's pretty hot. When you are staring at the idea of hand-mixing about 12 bags of ready-mix, "pretty hot" turns quickly to "oh no, much too hot". Add to the heat, this slow realization that I am not really in my early 20's anymore. And, to top it off, the clock is ticking; I have too many other things lined up.
I stood in the open space - soon to become my office - and contemplated the important things in my life. Being able to proudly say "I built this", is pretty low on that list. So, I will dip into the coffers and pay someone to do it for me. The things that are very critical (electric and HVAC) were planned to be hired help, and the areas where I have no skills (stucco) as well. However, after deep consideration, the rest of the work too will be outsourced.
Wow, what am I going to do with all this time?