I think it depends on the imortance of the issue.
My Trees that were getting mutilated by the quick onset of insects last year was Definatly worth the 50 Bucks to get them professionally Sprayed to avoid them dying and Needing More $$ to Replace them later on - Plus they are bigger nicer plants and Trees - so this was a No Brainer for me.
As far as the grass getting to high -
It Can Wait till we have the time!! No it doesn't wait Weeks.... we get to it before it looks too bad -
But I can't imagine paying someone to do that .
Also I can't imagine paying anyone to Clean my house, Unless it was an Immediate Need!!
Like the health dept. deemed it un habitable or something!

lol
I also can't seem to Find the time to Menu PLan and Coupon Cut. -
For me it saves time Going to ONE store and Buying only whats on sale, and planning my meals later.