When I started my company I asked my boss from my internship what hints he had for me, he said; "You need to have way too many expenses, it keeps you on your edge."
Ofcourse he didnt mean that as, buy $100 lunches, buy overpriced crap. But buy the equipment, rent an office, buy what you need to buy, if you are afraid where you'll get the money for the next months rent you'll work that much harder to earn it.