I always thought the idea of getting rid of a body by dumping it in an acid bath was impractical and inefficient — it would take such a long time to break down, and would require so much in the way of chemicals. Raychelle Burks does the test, dropping chunks of pork in beakers of hydrochloric acid or sodium hydroxide, and my suspicions were confirmed. This is a bad way to do it. It’s also really gross.
You really need to get a biologist’s expertise for this job. My first thought was dermestid beetles — clean it down to bare bones, then mount the skeleton and store it in plain sight in the anatomy lab. You don’t have any beetles? There’s always Lord Dunsany’s solution.
But for simple practicality, just find a crematorium.