No, not at all.
I'm cheaper than the other con-men around here.
I work 9-1, and 2-4pm Mon-Thurs, and 9-12ish on Friday.
That's only about 26-27 hours, then allow for wet days, interruptions like dropping my daughter at school etc...
That's plenty to do.
I haven't been bang-on 4 weeks for months and months.
What I'm doing now is about 5 weeks ago.(if you know what I mean!)