I don't own one but my dad does.
I remember him getting up super early to go to work (tradie) and getting home around dark only to do paperwork till like 11 pm every night.
funny thing is he used to get pretty good contracts when he had employees. But on the flipside, it pretty much ate profits.
Around 2008 it went tits up for him, bad contract with a guy that went bust and didnt pay him.
Now he has no employees, chooses easy jobs, works much less and pretty much has a similar lifestyle as before.