you don't need an llc or a sub s corp to start a small business. in fact its more expensive for you to go that route. go to your county court house, fill out sole prop docs (prob less than $25.00), take that doc to the bank and get an account and your done. small business started. that should get you till you are actually making enough money to consider a sub s corp or an llc. if your not making money ie profit, it makes no sense to incorporate because you gain no benifet from it. legal protectdion from a llc is hollow...any good lawyer can pierce a corporate shell in a few hours...if you need business insurance, its not hard or expensive to put a million dollar policy in place, and nobody's gonna sue you for more than that anyway. at some point you will need to get state sales tax stuff done and all you have to do is call your state comptroller and they can walk you through that. I do recommend spending money on a good bookkeeper and accountant, as that will save you money in the long run.
you def need a business plan and it needs to be written. put all your numbers together and see if the business is worth messing with...if the numbers work, then your gtg
I have 3 successful business right now so pm me if you have any more questions...