You might want to first provide some more information regarding your objectives in setting up your photo catalog? For example, are you planning to use the 'native' photo app on the iPad? How do you want to transfer images to the iPad, e.g. sync w/ your computer, use a cloud based or other wireless option(s)? Do you take your own pics; if so, then the CCK (Camera Connection Kit) would be a consideration?
Many options, third party apps, and other suggestions can be made once these questions are addressed - good luck!
The IPad Forum is a community of members from all walks of life and from all over the world coming together to share our experiences and to help each other learn about this wonderful piece of technology the Ipad. There is a wealth of information already here in the many threads we have so doing some searches will answer most of the questions you have. If then you cannot find the answer you are seeking then by all means post your question. There are many friendly and informed members here only too willing to help you.