LOL - somewhat cheeper rabbit skins, already skinned, can be obtained from Tandy Leather. I hope that helps; they whole skins.
As for preparing the skins, salt water will not work well. You can get home tanning chemicals or, if you really want to, you can rub the brain of the rabbit over the skin side (not the hair) and that will tan the hide. One brain will do one hide. This is "NOT MY FAVORITE WAY" and I don't tan skins anymore, but.................. you asked.