I started in January. At THAT time, I had some cash to buy a 48" ValueJet package deal. I had some experience with design and other creative trades which have been an asset, but no experience in large format printing. After much consideration, I kept my investment to a minimum and bought a quality plotter and have subbed out the large format stuff.
In hindsight, I am glad I kept that extra money. Because, it is LONG GONE. I spent it on all the other stuff I guarantee you are not factoring. Like every time you get a 150 dollar sign job, you are spending about 140 dollars on start up supplies, tools, software, fonts. Not to mention the cost of doing everything 2, maybe three, times to get the level of quality you want to represent your name and business.
It was overwhelming and still is. But I am making it. Believe me, there is plenty to learn without making the trade without making that investment.
But again, you did not provide many details, so I can only pass along my experiences. You may have won big on Deal or No Deal and looking for a way to burn some money.
Listen to Fred, Big Dog and the others. I have several times over the past several months and I thank them. They may not be telling you what you want to hear, but they are giving some sound advise.
GP