As a part time photographer myself, I find it very strange that your photographer will only give you 2.5mp files. That is not standard practice. Typically, you would get full-rez, processed .jpeg files.

I would never give a client the RAW files, neither do most photographers. RAW is incomplete and they require processing, which is part of the service offered. It's like asking a film photographer to provide the negatives.

But you should expect to get the full-rez processed .jpeg files with personal use rights.