Hard. You have to make sure that you comply with all the rules in your area. You have to handle the inventory (if there is one) and all the books. If you have the money and need to higher others then you have a whole set of other laws and rules to deal with. You also have to worry about sales tax and so many other issues.

Make sure you are ready for the responsibility before you start or you will get overwhelmed very quickly.
a REAL time business will take YOUR life away from YOU !
all YOUR time will be spent on running that business NO matter what it is the trial and error of advertisng alone will keep you up nights !

However an online business Will keep making money for YOU even when YOUR PC is off !
Becuse YOUR Blogs and websites are always running !

Once you have the system set up it basically runs on auto pilot all YOU have to do is update YOUR websites once a month !

And answer E mails and the phone once in awhile !

HEY i'm doing IT and YOU can too !

see me ersuer name !
PRO:
be your own boss
success depens on your efforts

CON:
long hours
no vacation
risky with high failure rate
personal capital and pride at stake
difficult to find good employees
Why not ask a some of your local business owners/ They will tell you the answers straight. The are going through it. That is your best bet.
it can be a real headache
it can be extremely rewarding
it can be frustrating
how far you want to go?
you get to be the BOSS!!!