XML offer list

Hello!

I’m really not pro in wordpress so sorry if my questions sound stupid.

I have small problem with one project that I still have to accept or decline, my “customer” need simple offer list, that can be written manually and same time updated via XML trough 3 other sources. I would also need advanced search for dates, type,… does anyone know a plugin for something like that? If not, I would ask developers how much would something like that cost if they would program it.

Thanks for your time!