Many companies use Zoho. I didn't check the price offered by your local resellers.
Also there's a lot of OPEN SOURCE ACCOUNTING SOFTWARE (google that). But, although it's free, you might need a lot of time to set it up, while you prefer to spend that time to expand your business.
Did you consider to outsource your bookkeeping to an accountant? Or - if you really are very small - just use a few spreadsheets?
We are in the early stages of our startup. Therefore, our spending needs to be as minimal as possible. I was looking at Xero as others have suggested, but I find it rather expensive at $30/month. Are there any other good alternatives?