Hate to see a business fail just because of poor preparation, my first business didn't do as good as it could have because I didn't research well enough and it was a hard lesson but one that lead me into many other successful ventures so it some ways it was a good fail. Some business survive with very little intervention and or business know how but there aren't many that can so it pays to do everything you can at the beginning before things get out of control.
Over the years I've had several good business mentors who were able to offer advice and knowledge from years of their own experiences and these people were worth their weight in gold, yet asked for no payment. Now days I am part of the same group offering advice to people who request it to try and ensure their business isn't one of the 60 odd percent that fail each year. Good business advice is often hard to come by but if you find the right stuff it's well worth listening to.