If you put your labor cost at mere $10 an hour , would DIY speakers still be cheaper than store bought speakers with reasonable discount?
There are all kinds of questions in addition to labor cost + part cost.
Would the aesthetics be as beautiful (B&W 800D, Revel Salon2, RBH SVT, KEF Blade, etc.) ?
If Stereophile or Audioholics were to professionally measure these speakers, would they measure as well ?
Could you make a lot more money from working overtime at your regular job, instead of working on your speakers?
How much time would you waste on building the speakers, instead of spending that time with your family (unless your family is very different than most families and they actually build the speakers with you) ?
DIY may or may not be for you depending on how you answer these questions.