From what I read in your description, it is quite clear and straight forward; just need some clarifications on UI requirements and XML schema. With 15 years of experience of software development, I'm confident that I can deliver the software in just 02 days (actually most of the time will be spent on understanding your requirements, not coding). And since this is my first time working as a freelancer, I'll try my best to make you happy with my deliverable, on both quality and pricing.
Please contact me if you need further details.
Best regards,
Huy