Should I invest in equipment at the early stage of my business?

The question is a bit off - it's not "should I" but "what exactly and how much." There's equipment you absolutely need to launch your business, and then there's fancy stuff that can wait. Start with the bare essentials, test whether your model actually works, then invest in expanding once you understand where the money's going. From my own experience - whenever I start something new, there's always this urge to buy all the coolest gear right away, but half the time it turns out that most of that "cool stuff" just sits around unused.