You can hire like 15 people and it's still faster to do it yourself. True to life.
On another note: One can hold down left mouse button and move the mouse, which retriggers the click like 100 times per second.
Viewing post in Idle Construction Company (Beta) comments
Yes rebalancing will be quite neccessary:
also the levels do not increase something except for house looks (at least as far as I can tell - level 8) I would suggest to add some sort of increase from level to level.
the game feels a bit one-dimensional yet. Some sort of prestige mechanism would be good I think.