Sell two of your computers... you only need one.
Read "The E-Myth" by Michael Gerber.... It's $11.20 from Amazon! Plus s/h
You have an advantage just starting out - if you think about working ON your business instead of IN the business - long term, you'll be much further ahead. When you start working ON your business, you'll realize that you need a lot of education (that goes for anyone... as it's a continuing process, not a one time shot). Invest in your education - as much as you can afford. Your worth ethic should translate to learning ethic - as you should find yourself just as interested if not more so interested to learn than you are to run your business and do the work. The learning is what will make your life easier down the road.