Now the advantages!
The above comments are basically right on mark concerning running your own business. The hours are long, taxes, payroll, collecting money, responsibility for work being completed in a timely and professional manner, travel, leagalize, (the list goes on) and all (in my case anyhow) raising four children.
Now let me state some of the advantages: Money, Freedom from politics (perhaps the biggest reason for me), Total creativity from the ground up, Being your own boss (not enough can be said about this!), The thrill of losing your a$$ (never boring!), etc. The advantages go on and on for me. I cant tell you how many systems I've desinged in my sweats. Regarding the children, yes, you do make some sacrifices but when I'm in town and I have a "family thing" with my wife and kids, I just do it, period.
Most here who run their own business' would probably attest to the fact that it takes serious commitment and fortitude to run a business succesfully. Be prepared, eventually you will get "burned" somehow and in some way but then some of us would'nt have it any other way.
All that being said, go for it SD. IMHO I would start out slow and get a taste of it (dont quit your day job just yet). Regarding the rates you should charge, you should first check out locally what the going rates are (this varies across the nation and world for that matter). The more unique the service you have to offer, the better the rate you can charge.
This may or may not be for you and thats perfectly OK. Both sides of the fence have their pro's and con's. Try it and see for yourself.
Regards,
Chris