Software :: Basic Webbased Accounting Or Financial Software?

By Webbased, I just mean running on a *AMP stack, not that is accessable over the actual web. Anyway, I am looking for software, preferrably OSS to fill very simple and specific needs. Basically, I have a very small business renting rooms to guests. It is possible for guests to order services, such as an item of food or drink, or a service such as laundry. What I am trying to setup, is a very basic system in which the receptionist can enter in guests along with their name, and perhaps other arbitrary details such as passport number, room number or such.

Additionally, anytime a guest make a purchase, it would be recorded to the guest account. This is all that I want the reception to be able to do...not have access to anything else, just to book in purchases. I then want the manager to be able to generate reports. For example, for a specific guest to see what purchases that guest made. Or to generate an income statement for a given month or time period. Or to see how much a particular food item has been ordered. Additionally, each record of a purchase must be able to have an ID number or such, which corresponds to an actual paperslip/bill..........