You don't have any suggestions that don't involved daily syncs of music and reducing the number of photos I carry.
I don't have wifi available at work for streaming music, so the higher data plan needed to stream music at work is more expensive than just buying the iPad with the greater capacity, and at the end of two years i can sell my iPad for more than I could a 16GB one. The initial cost may be higher, but amortized over 24 months my total costs are lower.
I also use my iPad for Djing, in addition to my laptop, and resyncing songs and making sure the song databases are correct is a huge headache compared to being able to keep the music on there.
But by all means, suggest an alternative other than 'don't use your ipad so much'.